When is Japan’s rainy season?

Tsuyu usually runs from early June to mid July across most of Honshu, Shikoku, and Kyushu. Okinawa starts earlier and ends earlier. Hokkaido is the major exception and does not have a true rainy season.

How hot does Japan get in summer?

Very hot. Kyoto averages 34°C in August and often feels worse because of trapped basin heat. Tokyo averages around 31°C with extreme humidity. Sapporo is much more comfortable at roughly 27°C.

Yes, and some regions get world-class snowfall. Hokkaido and the Sea of Japan side are serious snow country. Tokyo sees only light snow occasionally, while Kyoto gets infrequent winter snow.

When is typhoon season in Japan?

Typhoon season runs from August to October and peaks in September. Okinawa and Kyushu are most exposed, while Hokkaido is the least affected major travel region.

Is Japan humid in summer?

Extremely. Tokyo humidity commonly sits near 78% to 80% in July and August. The humidity is the real summer problem because it turns moderate-looking temperatures into physically draining days.

What is the weather like in Japan in October?

October is one of Japan’s finest travel months: roughly 20 to 23°C in major Honshu cities, sharply lower humidity, fading typhoon risk, and the start of serious autumn foliage in Hokkaido and mountain regions.

Is Japan cold in winter?

That depends entirely on region. Tokyo and Kyoto are cold but manageable in winter. Sapporo is genuinely cold and snowy. Okinawa stays mild enough for travelers who want to avoid real winter.

What is the weather like in Japan in March?

March is unstable. Early March can still feel wintry, while late March can be spring-like. The sankan-shion pattern creates regular cold-warm swings, so layers matter more than one fixed outfit.

Which Japanese city has the best weather year-round?

For mild Honshu weather, Hiroshima and Osaka perform strongly because of the Seto Inland Sea effect. For year-round warmth, Okinawa wins. For summer comfort, Sapporo is the easiest answer.

How does Kyoto weather compare to Tokyo?

Kyoto is consistently hotter than Tokyo in summer, especially in July and August, because its inland basin geography traps heat. Winter is similar, but summer comfort is clearly worse in Kyoto.

What should I pack for Japan in April?

Bring layers. April mornings can sit around 10°C and afternoons can reach 18 to 20°C. A medium-weight jacket, lighter tops, a compact umbrella, and comfortable walking shoes are the right base kit.

When is Japan’s rainy season?

Tsuyu usually runs from early June to mid July across most of Honshu, Shikoku, and Kyushu. Okinawa starts earlier and ends earlier. Hokkaido is the major exception and does not have a true rainy season.

How hot does Japan get in summer?

Very hot. Kyoto averages 34°C in August and often feels worse because of trapped basin heat. Tokyo averages around 31°C with extreme humidity. Sapporo is much more comfortable at roughly 27°C.

Yes, and some regions get world-class snowfall. Hokkaido and the Sea of Japan side are serious snow country. Tokyo sees only light snow occasionally, while Kyoto gets infrequent winter snow.

When is typhoon season in Japan?

Typhoon season runs from August to October and peaks in September. Okinawa and Kyushu are most exposed, while Hokkaido is the least affected major travel region.

HomeJapan Weather by Month

Weather Planning Hub

Japan Weather by Month: Complete Climate Guide (2026)

Japan stretches 3,000 km from subtropical Okinawa to subarctic Hokkaido, so the weather varies far more than most visitors expect. This page shows what the year actually feels like, month by month and city by city, before you lock flights or hotel dates.

Open 12-Month Weather Guide Compare Major Cities

🌡️ Temperature Range

-20°C in Hokkaido winter to 38°C in Tokyo heat waves

🌧️ Rainy Season

June to July across most of Japan

🌀 Typhoon Season

August to October, with September peak risk

☀️ Best Weather Months

April, May, October, and November

Fast answer

Two golden weather windows

April to May / October to November

April to May and October to November are Japan’s two golden weather windows: mild temperatures, lower humidity, manageable rainfall, and the best seasonal scenery.

What matters most

June and early July are defined by rainy season almost everywhere except Hokkaido.
July and August are less about temperature alone and more about oppressive humidity plus heat.
September is the highest-risk weather month because typhoon volatility can erase multiple travel days.

Climate Data Hub

Quick Answer: Best Weather by Goal

If you only need the short answer, this section tells you which months usually perform best for comfort, snow, sakura, beaches, crowd avoidance, and typhoon avoidance.

Goal	Best Months	Worst Months
Best overall weather	April to May, October to November	June to July rain, August heat
Snow and skiing	January to February	-
Cherry blossoms	Late March to April	-
Beach and Okinawa	May to October	January to February
Autumn foliage	October to November	-
Avoid crowds plus good weather	Early May after Golden Week, October	Golden Week and Obon
Avoid heat and humidity	October to May	July to August
Avoid typhoons	November to June	August to October

Climate Data Hub

Japan Climate Zones Explained

Japan climate planning gets much easier when you stop treating the whole country as one weather system. The map below reduces the country into six travel-relevant climate zones.

Subarctic

Sea of Japan Coast

Pacific Coast

Central Highland

Seto Inland Sea

Subtropical

Active climate zone

Pacific Coast

Tokyo, Kyoto, Osaka, Nagoya, Fukuoka

Humid subtropical

Key characteristic

Hot humid summers, mild winters, June rainy season

This is the climate most first-time visitors actually feel: mild winters, cherry-blossom springs, tsuyu in June, and exhausting heat in July and August.

Best months

April to May, October to November

Watch out for

June to August

Typical cities

TokyoKyotoOsaka

The single most important climate fact

Japan has a rainy season from early June to mid July across most of Honshu, Shikoku, and Kyushu, but not Hokkaido. This is the biggest weather divide first-time visitors miss.

Climate Data Hub

Month-by-Month Weather Deep Dive

Use the tabs to jump to the month you care about. All twelve month panels stay on the page so you can scan the whole year without losing context, but the active tab determines what stays visible first.

Active month: June★★½ Weak for Honshu, strong for Hokkaido

January

Cold, dry, clear - Japan’s most photogenic winter month

★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	-2°C	-12°C	8 mm	22	68 hrs
Tokyo	10°C	2°C	52 mm	5	192 hrs
Kyoto	9°C	1°C	48 mm	7	155 hrs
Osaka	10°C	3°C	45 mm	6	162 hrs
Hiroshima	9°C	1°C	42 mm	7	158 hrs
Fukuoka	10°C	3°C	68 mm	8	145 hrs
Okinawa	20°C	14°C	105 mm	10	95 hrs

What January feels like

Tokyo and Kyoto are cold but manageable, with bright blue-sky days and dry air that usually feels kinder than equally cold European winters. Sapporo is genuinely cold, but the powder snow is extraordinary. Okinawa stays mild enough to feel like a different country.

Travel verdict

★★★★ Underrated winter value

Cold but beautiful, budget-friendly, and low-pressure for classic city sightseeing.

Weather highlights

Tokyo and Kyoto are at their clearest point of the year, so Mount Fuji visibility peaks.
Sapporo is in full powder mode, with ski and onsen trips performing at their best.
Okinawa’s kanhizakura bloom begins in late January.
Dry winter air makes photography, city walks, and long views especially rewarding.

Winter and snow planning guide

February

Coldest month nationally, but snow festivals and plum blossoms begin

★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	-1°C	-12°C	7 mm	20	82 hrs
Tokyo	11°C	2°C	56 mm	6	178 hrs
Kyoto	10°C	1°C	62 mm	8	148 hrs
Osaka	11°C	3°C	58 mm	7	155 hrs
Hiroshima	10°C	2°C	65 mm	9	148 hrs
Fukuoka	11°C	4°C	72 mm	9	138 hrs
Okinawa	21°C	15°C	118 mm	12	88 hrs

What February feels like

February is statistically the coldest month in much of Japan, but it is also when the first spring signals appear. Plum blossoms begin in the south and central cities, while Sapporo turns cold into theatre with the Snow Festival.

Travel verdict

★★★★ Cold but high-payoff

Snow Festival, plum blossoms, and crisp winter light make February stronger than many first-time visitors assume.

Weather highlights

Sapporo Snow Festival makes deep winter feel celebratory instead of punishing.
Tokyo and Kyoto start showing ume blossoms in late February.
Okinawa remains the warmest place in the country and continues its early sakura cycle.
Late-winter Fuji views and Diamond Fuji windows are especially good.

Winter and snow planning guide

March

Transition month - winter fades unevenly and spring arrives in bursts

★★★½

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	4°C	-6°C	22 mm	14	118 hrs
Tokyo	15°C	6°C	118 mm	11	168 hrs
Kyoto	14°C	4°C	108 mm	11	155 hrs
Osaka	15°C	5°C	102 mm	10	162 hrs
Hiroshima	14°C	4°C	142 mm	12	158 hrs
Fukuoka	14°C	6°C	118 mm	11	148 hrs
Okinawa	22°C	17°C	145 mm	13	105 hrs

What March feels like

March is Japan’s most unstable travel month. Early March can still feel winter-like, while late March can feel genuinely spring-like. Rainfall rises, sakura nerves start, and Hokkaido still lags far behind the south.

Travel verdict

★★★½ Exciting but unpredictable

Late March can be magical, but rain and temperature swings are real planning risks.

Weather highlights

Kyushu cities begin sakura season in mid to late March.
Tokyo and Kyoto can flip from coat weather to picnic weather in the same week.
Sapporo is still in thaw mode rather than spring mode.
The classic sankan-shion rhythm makes layers essential.

March planning warning

Late-March sakura travel is highly weather-sensitive. Rain can shorten bloom by several days, and 8°C mornings can become 18°C afternoons.

Sakura timing guide

April

Japan’s most beautiful month - mild, bright, and cherry-blossom led

★★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	12°C	1°C	48 mm	10	158 hrs
Tokyo	19°C	10°C	132 mm	11	178 hrs
Kyoto	19°C	8°C	128 mm	11	172 hrs
Osaka	20°C	9°C	118 mm	10	178 hrs
Hiroshima	19°C	8°C	148 mm	12	168 hrs
Fukuoka	19°C	10°C	138 mm	11	165 hrs
Okinawa	24°C	19°C	165 mm	13	115 hrs

What April feels like

April is the month most travelers picture when they imagine ideal Japan weather. Temperatures settle into the easiest sightseeing range, city parks explode with cherry blossom color, and mornings are cool without feeling harsh.

Travel verdict

★★★★★ Best overall spring weather

If you can tolerate crowds and higher prices, April remains one of the cleanest all-around Japan weather answers.

Weather highlights

Tokyo, Kyoto, and Osaka usually sit inside peak or near-peak sakura in the first half of the month.
Kanazawa and Tohoku cities bloom later, extending the season northward.
Sapporo stays cool, with spring arriving noticeably later than Honshu.
The only real downside is crowd and price pressure, especially around Golden Week.

April pro tip

Use 6am to 9am for your major outdoor sightseeing blocks. The weather is ideal, the light is cleaner, and the crowd curve is dramatically better.

Sakura timing guide

May

Post-sakura perfection - warm, green, and still comfortable

★★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	18°C	7°C	62 mm	11	188 hrs
Tokyo	23°C	15°C	138 mm	11	198 hrs
Kyoto	24°C	13°C	148 mm	11	195 hrs
Osaka	25°C	14°C	145 mm	10	202 hrs
Hiroshima	24°C	13°C	162 mm	12	192 hrs
Fukuoka	24°C	15°C	158 mm	11	188 hrs
Okinawa	27°C	22°C	235 mm	16	145 hrs

What May feels like

May has two very different faces. Golden Week is crowded and expensive, but once it passes the country settles into one of its best travel windows: warm afternoons, low-stress humidity, vivid greenery, and better value than April.

Travel verdict

★★★★★ Best-kept weather secret

Post-Golden Week May is one of the smartest Japan trip windows of the year.

Weather highlights

Sapporo becomes Japan’s last major sakura city in early May.
Tokyo and Kyoto shift from sakura to fresh green season and wisteria.
Okinawa enters rainy season first, usually in the second half of the month.
Humidity is starting to rise, but not yet enough to damage comfort in Honshu.

May sweet spot

May 6 to 20 gives you post-holiday prices, pre-rainy-season conditions, and some of the easiest countryside weather of the year.

June

Tsuyu rainy season - grey, humid, and much better in Hokkaido

★★½

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	22°C	13°C	68 mm	10	172 hrs
Tokyo	26°C	19°C	168 mm	14	128 hrs
Kyoto	27°C	19°C	215 mm	15	138 hrs
Osaka	28°C	20°C	205 mm	14	142 hrs
Hiroshima	27°C	19°C	248 mm	15	145 hrs
Fukuoka	27°C	20°C	278 mm	16	138 hrs
Okinawa	30°C	25°C	245 mm	17	148 hrs

What June feels like

June is where Japan climate planning starts separating smart itineraries from romantic ones. Honshu, Shikoku, and Kyushu turn grey and sticky under tsuyu, while Hokkaido quietly becomes one of the best places in the country.

Travel verdict

★★½ Weak for Honshu, strong for Hokkaido

June is usually a poor mainstream sightseeing month unless your route is built around Hokkaido.

Weather highlights

Sapporo avoids the rainy season entirely and feels mild, green, and easy.
Tokyo and Kyoto start their humid grey stretch, with long overcast runs and regular rain.
Hydrangeas look beautiful in the rain, but sightseeing productivity drops.
Okinawa often exits rainy season in late June and starts shifting into beach mode.

Tsuyu warning

Most of Japan enters rainy season in June, but Hokkaido does not. If you need a June trip with comfortable weather, Sapporo is the cleanest answer.

Why Sapporo wins in June

July

Hot and humid, with rainy season ending and summer pressure building fast

★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Humidity	Sunshine
Sapporo	26°C	18°C	82 mm	12	72%	178 hrs
Tokyo	30°C	23°C	152 mm	13	78%	158 hrs
Kyoto	32°C	24°C	218 mm	13	72%	185 hrs
Osaka	33°C	25°C	188 mm	12	70%	192 hrs
Hiroshima	32°C	24°C	225 mm	13	72%	188 hrs
Fukuoka	32°C	25°C	278 mm	14	75%	178 hrs
Okinawa	32°C	27°C	142 mm	10	78%	185 hrs

What July feels like

July starts in rainy-season recovery mode and ends in full summer stress. Once tsuyu breaks, the combination of heat, humidity, and hard sunlight becomes the defining travel challenge across Tokyo, Kyoto, and Osaka.

Travel verdict

★★★ Saved by festivals and geography

Honshu summer weather is rough, but festivals, Okinawa beaches, and Hokkaido comfort keep July viable.

Weather highlights

Rainy season usually ends in mid-July for Kanto and Kansai, but exact timing varies.
Kyoto becomes one of the hottest big-city basins in the country.
Sapporo remains markedly more comfortable, often around 8°C cooler than Kyoto.
Okinawa is already in full beach season and Hokkaido is at its most comfortable.

July survival strategy

Treat 11am to 3pm as recovery time in Tokyo or Kyoto. Put your long outdoor blocks before 10am and after 5pm, and assume you will need cooling breaks.

Festival season route guide

August

Peak summer heat - Japan’s hottest mainstream travel month

★★½

City	Avg High	Avg Low	Rainfall	Rainy Days	Humidity	Sunshine
Sapporo	27°C	19°C	88 mm	12	74%	185 hrs
Tokyo	31°C	24°C	168 mm	13	80%	178 hrs
Kyoto	34°C	25°C	148 mm	11	68%	208 hrs
Osaka	33°C	25°C	128 mm	10	66%	215 hrs
Hiroshima	32°C	24°C	118 mm	9	68%	212 hrs
Fukuoka	32°C	25°C	172 mm	11	72%	198 hrs
Okinawa	32°C	27°C	238 mm	14	80%	172 hrs

What August feels like

August is a heat-management month before it is anything else. Kyoto’s basin heat becomes extreme, Tokyo stays muggy deep into the night, and the cultural payoff comes from festivals rather than comfort.

Travel verdict

★★½ Culturally rich, physically hard

Festivals justify August for some travelers, but comfort and flexibility are much weaker than in spring or autumn.

Weather highlights

Kyoto is often the hottest major city due to basin geography.
Tokyo’s 80% humidity makes the city feel hotter than the raw temperature suggests.
Sapporo remains the coolest major-city answer in summer.
Late August begins the first meaningful typhoon-watch period.

Heat warning

July and August in Honshu are not just warm. They are genuinely humid and heat-stress heavy. Electrolytes, air conditioning, and midday breaks are non-negotiable.

Festival season route guide

September

Typhoon peak - weather risk remains high even as heat begins to fade

★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Typhoon Risk	Sunshine
Sapporo	22°C	13°C	112 mm	13	Low	155 hrs
Tokyo	27°C	20°C	225 mm	14	High	148 hrs
Kyoto	28°C	20°C	168 mm	12	Moderate	162 hrs
Osaka	29°C	21°C	158 mm	11	Moderate	168 hrs
Hiroshima	28°C	20°C	178 mm	12	Moderate	162 hrs
Fukuoka	28°C	21°C	195 mm	13	High	155 hrs
Okinawa	30°C	25°C	188 mm	13	Very high	158 hrs

What September feels like

September is volatile rather than consistently bad. Between storms it can feel much more comfortable than August, but the risk profile is the real story. This is Japan’s most forecast-sensitive travel month.

Travel verdict

★★★ Improving comfort, elevated risk

Conditions improve from August, but typhoon exposure adds real financial and itinerary risk.

Weather highlights

September is the statistical peak of typhoon season.
Temperatures drop noticeably from August, especially in Tokyo.
Hokkaido starts showing early autumn colour first, especially in the mountains.
Early September can still work for Mount Fuji and shoulder-season hikes if forecasts stay clean.

Typhoon warning

September is the month when travel insurance stops being optional and starts being practical. Build slack into your itinerary and watch JMA forecasts closely.

Broader Japan season strategy

October

Japan’s second golden weather window - arguably the best overall month

★★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Humidity	Sunshine
Sapporo	14°C	5°C	78 mm	11	62%	128 hrs
Tokyo	22°C	14°C	198 mm	12	65%	162 hrs
Kyoto	22°C	12°C	112 mm	9	62%	168 hrs
Osaka	23°C	13°C	105 mm	8	60%	175 hrs
Hiroshima	22°C	12°C	88 mm	8	60%	172 hrs
Fukuoka	23°C	14°C	88 mm	8	62%	165 hrs
Okinawa	27°C	23°C	152 mm	11	72%	148 hrs

What October feels like

October feels like release after summer. Humidity drops sharply, typhoon risk fades after mid-month, and the country becomes comfortable enough for long days outside again.

Travel verdict

★★★★★ Best pure weather month

October has the cleanest balance of comfort, scenery, and lower stress relative to spring.

Weather highlights

Hokkaido hits peak autumn foliage in the middle to later part of the month.
Tokyo and Kyoto are not yet at peak foliage, but the weather is often better than in November.
Osaka and Hiroshima sit in one of their driest parts of the year.
Humidity falls so sharply from August that the comfort difference feels larger than the raw temperatures suggest.

October versus April

April wins on sakura and spring atmosphere. October wins on lower humidity, fewer crowds, and more reliable outdoor comfort.

November

Foliage peak - cool, clear, dry, and very easy to travel in

★★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	6°C	-2°C	52 mm	9	82 hrs
Tokyo	17°C	8°C	92 mm	8	168 hrs
Kyoto	16°C	7°C	72 mm	7	162 hrs
Osaka	17°C	8°C	68 mm	6	168 hrs
Hiroshima	16°C	7°C	62 mm	6	165 hrs
Fukuoka	17°C	9°C	78 mm	7	155 hrs
Okinawa	24°C	19°C	118 mm	10	128 hrs

What November feels like

November is one of the most efficient travel months in Japan. Kyoto and Tokyo move into peak autumn foliage, rainfall sits near its annual low, and daytime temperatures stay highly usable for walking-heavy itineraries.

Travel verdict

★★★★★ Most underrated great month

November is the strongest crowd-to-weather ratio in the country if you care about comfort and scenery more than sakura.

Weather highlights

Kyoto’s best foliage often lands in the first half of the month.
Tokyo usually peaks from mid to late November.
Osaka and Hiroshima are among the driest they will be all year.
Sapporo starts transitioning into first-snow mode, while Okinawa still feels mild.

November hidden advantage

Autumn illumination events in Kyoto pair peak foliage with evening lighting, which gives November a second visual layer that October does not fully match.

December

Winter arrives - cold, dry, clear, and festive

★★★★

City	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Sapporo	0°C	-8°C	18 mm	18	62 hrs
Tokyo	12°C	4°C	48 mm	5	178 hrs
Kyoto	11°C	3°C	42 mm	6	155 hrs
Osaka	12°C	4°C	38 mm	5	162 hrs
Hiroshima	11°C	3°C	35 mm	5	158 hrs
Fukuoka	12°C	5°C	58 mm	7	145 hrs
Okinawa	21°C	15°C	105 mm	10	102 hrs

What December feels like

December brings back the clean winter pattern that makes Tokyo and Kyoto so workable in cold season: clear skies, low rainfall, and a surprisingly good daylight experience if you dress correctly.

Travel verdict

★★★★ Strong winter-city month

December is cold, but the visibility, lighting, and lower crowd pressure keep it attractive.

Weather highlights

Tokyo and Kyoto are cold but usually sunny and easy for sightseeing.
Sapporo begins building the snow base that leads into peak winter.
Christmas illuminations make major cities visually richer than January.
Okinawa remains the warmest winter answer for travelers avoiding real cold.

Winter and snow planning guide

Climate Data Hub

City-by-City Temperature Comparison

This is the fastest way to see why a summer trip to Sapporo feels nothing like a summer trip to Kyoto, and why Okinawa behaves more like a different climate band than just another Japan city.

Annual temperature overview

Six city lines, twelve months, one clear takeaway: Japan climate is not a single median story. The summer gap between Sapporo and Kyoto is especially important for trip comfort.

SapporoTokyoKyotoOsakaHiroshimaOkinawa

The chart centers one practical truth: Sapporo sits on a different summer comfort curve, Okinawa never gets truly cold, and Kyoto runs noticeably hotter than Tokyo in midsummer.

Annual temperature table

Month	Sapporo	Tokyo	Kyoto	Osaka	Hiroshima	Okinawa
Jan	-2 / -12	10 / 2	9 / 1	10 / 3	9 / 1	20 / 14
Feb	-1 / -12	11 / 2	10 / 1	11 / 3	10 / 2	21 / 15
Mar	4 / -6	15 / 6	14 / 4	15 / 5	14 / 4	22 / 17
Apr	12 / 1	19 / 10	19 / 8	20 / 9	19 / 8	24 / 19
May	18 / 7	23 / 15	24 / 13	25 / 14	24 / 13	27 / 22
Jun	22 / 13	26 / 19	27 / 19	28 / 20	27 / 19	30 / 25
Jul	26 / 18	30 / 23	32 / 24	33 / 25	32 / 24	32 / 27
Aug	27 / 19	31 / 24	34 / 25	33 / 25	32 / 24	32 / 27
Sep	22 / 13	27 / 20	28 / 20	29 / 21	28 / 20	30 / 25
Oct	14 / 5	22 / 14	22 / 12	23 / 13	22 / 12	27 / 23
Nov	6 / -2	17 / 8	16 / 7	17 / 8	16 / 7	24 / 19
Dec	0 / -8	12 / 4	11 / 3	12 / 4	11 / 3	21 / 15

What the data actually says

Hottest city in summer

Kyoto, at 34°C average August high because basin geography traps heat.

Coolest city in summer

Sapporo, at 27°C average August high, about 7°C cooler than Tokyo.

Coldest city in winter

Sapporo, with -12°C average January low.

Warmest city year-round

Okinawa, where average lows never fall below 14°C.

Driest major-city corridor

Hiroshima and Osaka, thanks to the Seto Inland Sea effect.

Most rainfall pressure

Fukuoka in July, with around 278 mm during the rainy-season overlap.

Climate Data Hub

Japan’s 5 Key Weather Events

These are the weather patterns and phenomena that most often change trip quality more than the average temperature alone.

🌧️ Weather event

Tsuyu - The Rainy Season

Tsuyu is the single most important weather fact most first-time Japan travelers underestimate. It is not constant all-day downpour, but it is a six-week period of persistent grey skies, sticky air, and repeated rain interruptions.

When

Early June to mid July across most of Honshu, Shikoku, and Kyushu

Duration

About six weeks

Affected regions

Most of Japan except Hokkaido; Okinawa enters earlier and exits earlier

Character

High humidity, frequent rain, low sky contrast, slower outdoor travel days

Travel impact

Outdoor sightseeing becomes less pleasant and photography becomes harder

Silver lining

Hydrangea season, fewer tourists, and better prices

Planning note: Tsuyu escape strategy: if you need a June Japan trip, prioritize Hokkaido or late-June Okinawa.

Why Sapporo works when the rest of Japan is in tsuyu

🌀 Weather event

Typhoon Season

Typhoon season is less about daily discomfort and more about volatility. A single storm can cancel flights, pause Shinkansen lines, and erase two days from a tightly packed route.

When

August to October, peaking in September

Average direct landfalls

Roughly 2 to 3 per year

Most affected

Okinawa, Kyushu, and the Pacific side of Honshu

Least affected

Hokkaido and parts of the Sea of Japan coast

Warning time

Usually 3 to 5 days from JMA forecasts

Typical disruption window

One to two days per storm, sometimes longer for transport recovery

Typhoon risk by city

Okinawa	Very high	Direct hits are most common here.
Fukuoka	High	Kyushu landfall risk is real.
Tokyo	Moderate	Pacific exposure means real disruption risk.
Kyoto and Osaka	Moderate	Some inland buffering, but still affected.
Hiroshima	Lower	Seto Inland Sea offers some shelter.
Sapporo	Low	Storms usually weaken before reaching Hokkaido.

Planning note: Travel insurance with weather cancellation coverage is a practical requirement for September travel, not just a nice extra.

Broader season strategy for avoiding weather risk

❄️ Weather event

Yukiguni - Snow Country

Japan’s Sea of Japan coast and Hokkaido collect some of the deepest snowfall on Earth. This is the climate engine behind the country’s ski culture and why winter destinations here attract global powder travelers.

Cause

Siberian air pulls moisture over the Sea of Japan and dumps it as snow

Best known for

Deep powder, ski towns, snow monsters, and onsen-snow scenery

Travel implication

Winter access can be magical, but road and train resilience matters

Typical annual snowfall

Niseko, Hokkaido	15m+	World-class dry powder.
Myoko, Niigata	12m+	Deep snow and smaller crowds than Niseko.
Hakuba, Nagano	10m+	Olympic legacy and broad resort variety.
Nozawa Onsen, Nagano	8m+	Traditional onsen village appeal.
Zao, Yamagata	8m+	Known for juhyo snow monsters.

Best Sapporo timing for winter and snow travel

🌡️ Weather event

Nettaiya - Tropical Nights

A tropical night is when the temperature never drops below 25°C. In Tokyo and Osaka this turns summer into a 24-hour problem rather than a daylight-only inconvenience.

Definition

Nighttime temperature stays above 25°C

Most relevant cities

Tokyo and Osaka

Main problem

Poor sleep quality without strong air conditioning

Practical response

Do not book July or August lodging without reliable air conditioning

Tokyo recorded 35-plus tropical nights across July and August in recent years.
Heat-retaining concrete and dense urban form make nights feel oppressive even after sunset.
Sapporo has a major summer comfort advantage because tropical nights are much rarer.

🌸 Weather event

Sankan-shion - Three Cold, Four Warm

This spring rhythm is why March and April itineraries often fail when travelers pack for a single temperature band. Japan spring runs on temperature swings, not steady warming.

When

Mostly March to April

Pattern

Roughly three cold days followed by four warmer days

Travel effect

Wide clothing swings and unstable sakura timing

Packing implication

Layers matter more than one heavier outer layer

Temperature swings of 10 to 15°C inside the same week are normal.
This pattern is a major reason cherry blossom forecasts remain forecast-driven rather than fixed.
Spring travelers should plan for cool mornings and warmer afternoons every single day.

How spring weather interacts with sakura timing

Climate Data Hub

Regional Weather Comparison Module

If your trip starts with geography instead of a specific month, this matrix shows which regions usually reward certain travel styles and which ones carry the biggest weather penalties.

Region	Best Months	Worst Months	Summer Temp	Winter Temp	Rainy Season	Typhoon Risk	Unique Feature
Hokkaido	June to August	January to February if you dislike cold	26 to 27°C	-12°C lows	No	Low	No rainy season and the country’s best summer escape
Tohoku	April to May, October	June to July	28 to 30°C	-2 to 5°C	Yes	Low to moderate	Earliest serious autumn foliage in the mountains
Kanto (Tokyo)	April to May, October to November	June to August	30 to 31°C	2 to 10°C	Yes	Moderate	Most forecast-sensitive urban travel market in Japan
Kansai (Kyoto and Osaka)	April to May, October to November	June to August	32 to 34°C	1 to 10°C	Yes	Moderate	Kyoto basin heat makes it tougher than Tokyo in midsummer
Kyushu	March to May, October to November	June to September	30 to 32°C	3 to 12°C	Yes, often heavy	High	One of Japan’s rainiest and storm-sensitive regions
Okinawa	May to October	September to October for typhoon risk	30 to 32°C	14 to 21°C	Yes, but earlier and earlier-ending	Very high	Only subtropical climate in the country

Climate Data Hub

What to Wear by Month

Japan packing works better when you compare your likely route instead of treating the whole country as one temperature band. These cards anchor Tokyo and Kyoto, Sapporo, and Okinawa side by side.

🧥

January

Tokyo / Kyoto

Heavy coat, thermals, gloves

Sapporo

Heavy down, snow boots, thermal base layers

Okinawa

Light jacket and T-shirt

Hand warmersThermal socksMoisturizer

🧣

February

Tokyo / Kyoto

Heavy coat and layers

Sapporo

Heavy down and serious winter footwear

Okinawa

Light jacket

Thermal base layerWarm scarfCompact lip balm

🧥

March

Tokyo / Kyoto

Medium jacket plus layers

Sapporo

Medium to heavy jacket

Okinawa

Light jacket

UmbrellaLayering topsWeather-flex shoes

🌸

April

Tokyo / Kyoto

Light to medium jacket

Sapporo

Medium jacket

Okinawa

Light layers

Compact umbrellaLight sweaterWalkable shoes

🌿

May

Tokyo / Kyoto

Light jacket for evenings

Sapporo

Light jacket

Okinawa

T-shirt plus light layer

SunscreenLight cardiganBreathable layers

☔

June

Tokyo / Kyoto

Light clothes and rain jacket

Sapporo

Light jacket

Okinawa

Summer clothes

Rain jacketQuick-dry socksDehumidifying powder

🧴

July

Tokyo / Kyoto

Summer clothes and cooling towel

Sapporo

Light summer layers

Okinawa

Full summer clothes

Cooling sprayElectrolytesPortable fan

🥵

August

Tokyo / Kyoto

Summer clothes and aggressive heat management

Sapporo

Light summer clothes

Okinawa

Full summer clothes

Portable fanCooling towelElectrolyte drinks

🌀

September

Tokyo / Kyoto

Light summer wear shifting into layers

Sapporo

Light jacket

Okinawa

Summer clothes

Rain gearTyphoon-ready umbrellaFlexible layers

🍂

October

Tokyo / Kyoto

Medium jacket and layers

Sapporo

Warm jacket

Okinawa

Light jacket

Light knitwearLayerable outerwearComfort shoes

🍁

November

Tokyo / Kyoto

Medium to heavy jacket

Sapporo

Heavy jacket with first-snow awareness

Okinawa

Light jacket

Warm layersLight glovesEvening coat

🎄

December

Tokyo / Kyoto

Heavy jacket and gloves

Sapporo

Heavy down and snow boots

Okinawa

Light jacket

Hand warmersWinter socksMoisture barrier cream

Essential Japan weather items

Compact umbrella for sudden showers in any season
Comfortable walking shoes for 15,000 to 20,000 steps per day
Portable battery pack for maps, weather apps, and translation tools
Layering basics because spring and autumn temperature swings are real

July and August survival kit

Cooling towel sold almost everywhere in Japan
Portable fan or neck fan for midday city heat
Cooling spray for fast relief on train platforms and festival days
Electrolyte drinks such as Pocari Sweat, not just plain water
UV-block parasol if you want the most effective local heat-management upgrade

Climate Data Hub

Weather and Travel Planning Guide

This is the decision layer: not just what the weather is, but which windows actually create the smoothest trip once comfort, crowds, and value sit in the same frame.

Spring peak

Late March to early May

Cherry blossoms, mild temperatures, and visually iconic scenery

Caveat: Crowds and hotel prices are at annual highs

Autumn peak

October to mid November

Low humidity, clear days, foliage season, and fewer crowds than spring

Caveat: Early October can still sit inside the tail of typhoon season

Late-spring sweet spot

May 6 to May 20

Post-Golden Week prices, pre-rainy-season comfort, and lush green landscapes

Caveat: Humidity starts to creep upward by late May

Winter budget window

January to February

Excellent value, clear skies in major cities, and snow travel upside

Caveat: Cold limits comfort if your trip is mostly outdoors

Month-by-month travel rating summary

Scores blend weather quality, crowd pressure, and overall value. Green means 4.5 or better. Amber is still usable. Red means the trade-offs are much harsher.

Month	Weather	Crowds	Value	Overall
Jan	★★★★	★★★★★	★★★★★	★★★★
Feb	★★★★	★★★	★★★★	★★★★
Mar	★★★	★★★★	★★★★	★★★½
Apr	★★★★★	★★	★★	★★★★
May	★★★★★	★★★	★★★★	★★★★★
Jun	★★	★★★★★	★★★★★	★★★
Jul	★★★	★★★	★★★	★★★
Aug	★★	★★	★★★	★★½
Sep	★★★	★★★★	★★★★	★★★
Oct	★★★★★	★★★	★★★★	★★★★★
Nov	★★★★★	★★★★	★★★★	★★★★★
Dec	★★★★	★★★★★	★★★★★	★★★★

Climate Data Hub

Frequently Asked Questions

These are the questions that usually show up once travelers stop asking for a generic best month and start comparing risk, comfort, humidity, and packing reality.

October and November are the strongest all-around weather months in Japan: mild temperatures, lower humidity, relatively low rainfall, and autumn foliage. April and May are equally strong if sakura and spring color matter more to you.

Climate Data Hub

Our Verdict

The best answer changes with trip style, but the data does narrow the field quickly once you compare comfort, humidity, and risk instead of only average temperature.

Best weather overall: October and November. Best spring weather: May 6 to 20. Best summer destination: Sapporo. Highest weather risk: September typhoon season.

Best weather overall

October and November combine mild temperatures, low humidity, and low-pressure sightseeing days.

Best summer answer

Sapporo is the cleanest way to avoid the worst of mainland summer heat and humidity.

Best spring value

May 6 to 20 is the savvy post-Golden Week window when weather and value overlap best.

Highest weather risk

September is the month where volatility, not average comfort, becomes the dominant planning problem.

Best fit by traveler priority

Visitor Priority	Best Months	Avoid
Best weather	October to November, April to May	June to August
Cherry blossoms	Late March to April	-
Autumn foliage	October to November	-
Skiing and snow	January to February	-
Beach and Okinawa	May to October	January to February
Budget plus decent weather	January, Hokkaido in June, November	April peak and Snow Festival weeks
Avoid heat	October to May	July to August
Avoid typhoons	November to June	September

Climate Data Hub

Related Guides

Use the weather hub to choose timing, then move into the destination or seasonal guide that matches the actual trip shape you are building.

Best Time to Visit Japan

Start broader if you still need to choose the season before comparing weather details by month.

Best Time to Visit Tokyo

Use this if your weather decision is really about a Tokyo city trip and first-timer comfort.

Best Time to Visit Kyoto

Helpful if you need Kyoto-specific heat, foliage, sakura, and crowd context.

Best Time to Visit Sapporo

The best companion guide for rainy-season escape logic, summer comfort, and winter snow planning.

Best Time to Visit Japan for Cherry Blossoms

Use this if spring bloom timing matters more than broad climate averages.

Japan Festival Calendar

Pair this with the weather guide when festivals and climate need to be planned together.

Major pages in this category

Major pages in this category

Major pages in this category

Major pages in this category

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Major pages in this category

Japan Weather by Month: Complete Climate Guide (2026)

Two golden weather windows

Quick Answer: Best Weather by Goal

Japan Climate Zones Explained

Pacific Coast

Month-by-Month Weather Deep Dive

Cold, dry, clear - Japan’s most photogenic winter month

Coldest month nationally, but snow festivals and plum blossoms begin

Transition month - winter fades unevenly and spring arrives in bursts

Japan’s most beautiful month - mild, bright, and cherry-blossom led

Post-sakura perfection - warm, green, and still comfortable

Tsuyu rainy season - grey, humid, and much better in Hokkaido

Hot and humid, with rainy season ending and summer pressure building fast

Peak summer heat - Japan’s hottest mainstream travel month

Typhoon peak - weather risk remains high even as heat begins to fade

Japan’s second golden weather window - arguably the best overall month

Foliage peak - cool, clear, dry, and very easy to travel in

Winter arrives - cold, dry, clear, and festive

City-by-City Temperature Comparison

Annual temperature overview

Japan’s 5 Key Weather Events

Tsuyu - The Rainy Season

Typhoon Season

Yukiguni - Snow Country

Nettaiya - Tropical Nights

Sankan-shion - Three Cold, Four Warm

Regional Weather Comparison Module

What to Wear by Month

Weather and Travel Planning Guide

Late March to early May

October to mid November

May 6 to May 20

January to February

Month-by-month travel rating summary

Frequently Asked Questions

Our Verdict

Related Guides

Best Time to Visit Japan

Best Time to Visit Tokyo

Best Time to Visit Kyoto

Best Time to Visit Sapporo

Best Time to Visit Japan for Cherry Blossoms

Japan Festival Calendar