AI-generatedKumamoto at a glance
- Best time
- Apr – May, Sep – Nov
- Warmest month
- Aug · 30°
- Warmest sea
- Aug · 27.8°
- Sunshine a year
- 1,780 h
- Rain a year
- 1,889 mm
- Climate
- Temperate
- Time zone
- UTC+9
- Elevation
- 9 m
Climate in Kumamoto
Kumamoto has a temperate climate with warm summers and cool winters. August is the warmest month with average highs of 30 °C, while January is the coolest at 9 °C. With around 1,780 hours of sunshine a year, Kumamoto is moderately sunny; August is the sunniest month with 6.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – May, September – November
October is the peak of the typhoon season
Good forSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 18°
- Midday, 13:00: about 23°
- Afternoon, 16:00: about 22°
- Evening, 20:00: about 19°
- Night, 23:00: about 18°
06:2017:45
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:05–06:53 · evening 17:12–18:01
- Blue hour
- Morning 05:55–06:05 · evening 18:01–18:10
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Kumamoto in October?
In October, Kumamoto is warm: daytime highs average 23 °C, and nights cool down to about 16 °C. The sea averages 23.4 °C – pleasant for swimming. Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 101 mm. All in all, October is an excellent month for a holiday in Kumamoto.
More details for October
- Daylight
- 11 h 25 min06:20 – 17:45
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 6 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 49 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %40 %
- Few rainy daysweight 30 %74 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- A jumper for the evenings
Sea temperature in Kumamoto
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 22.2 – 24.5 °C
Swimming season: Jun – Oct
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Kumamoto ranges from 12.8 °C in February to 27.8 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
From October to February the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 26.7 and 28.8 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 13.9° | 11.8° | 15.6° | cold |
| FebruaryFeb | 12.8° | 11.1° | 15.0° | cold |
| MarchMar | 13.8° | 11.5° | 16.0° | cold |
| AprilApr | 16.2° | 14.5° | 17.7° | cold |
| MayMay | 19.1° | 18.2° | 20.1° | fresh |
| JuneJun | 22.4° | 21.6° | 23.3° | refreshing |
| JulyJul | 25.8° | 24.4° | 27.4° | pleasant |
| AugustAug | 27.8° | 26.7° | 28.8° | warm |
| SeptemberSep | 26.6° | 25.5° | 27.9° | warm |
| OctoberOct | 23.4° | 22.2° | 24.5° | pleasant |
| NovemberNov | 19.7° | 18.7° | 20.9° | fresh |
| DecemberDec | 16.3° | 15.2° | 17.7° | cold |
Sunshine hours in Kumamoto
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.4 of 11.4 hours of daylight in Kumamoto, 47 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Kumamoto
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 6 · highSeek shade around midday; sunscreen SPF 30+, hat and sunglasses.
The sun is strongest in June (UV 11).
Minutes until sunburn in October
- Very fair skin
- about 25 min
- Fair skin
- about 30 min
- Light brown skin
- about 40 min
- Olive skin
- about 50 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Kumamoto: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Kumamoto has about 8 rainy days with 101 mm of rain in total.
Wind and clouds in Kumamoto
How breezy and how cloudy Kumamoto is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Kumamoto typically peaks at 14 km/h during the day: Beaufort 3, light breeze.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 49 % of the sky over Kumamoto: variable cloud, with about 5.4 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Kumamoto
How often the day gets hot in Kumamoto (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Kumamoto has about 0 hot days, with an average daytime high of 23 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Kumamoto
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
- muggy month (10+ muggy days)
PleasantOctober: nights around 16°. Ideal for sleeping, often with the window open. Muggy on about 6 days (dew point 18 °C or more).
The coolest nights are in January (3°), the warmest in August (24°). Tropical nights of 20 °C and more are the rule from June to September; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in May and in October. Nights fall below 8 °C on average from December to March, so the room should be heated. It is muggy (dew point 18 °C or more) on about 119 days a year, mostly from June to September.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 29 | 9° | 3° | 13.9° | 3.5 h | 8 | 62 |
| FebruaryFeb | 38 | 11° | 4° | 12.8° | 4.4 h | 9 | 87 |
| MarchMar | 53 | 14° | 6° | 13.8° | 5.0 h | 11 | 127 |
| AprilApr | 74 | 19° | 11° | 16.2° | 5.7 h | 11 | 135 |
| MayMay | 74 | 23° | 15° | 19.1° | 5.9 h | 11 | 183 |
| JuneJun | 56 | 26° | 20° | 22.4° | 3.8 h | 16 | 372 |
| JulyJul | 46 | 29° | 23° | 25.8° | 5.0 h | 17 | 314 |
| AugustAug | 49 | 30° | 24° | 27.8° | 6.0 h | 13 | 185 |
| SeptemberSep | 68 | 28° | 21° | 26.6° | 5.2 h | 11 | 163 |
| OctoberOct | 80 | 23° | 16° | 23.4° | 5.4 h | 8 | 101 |
| NovemberNov | 72 | 17° | 10° | 19.7° | 4.5 h | 8 | 94 |
| DecemberDec | 42 | 11° | 5° | 16.3° | 3.9 h | 8 | 66 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
32.81° N, 130.69° E · 9 m · Asia/Tokyo
Best time to visit Kumamoto
The best time to visit Kumamoto is from April to May and from September to November. For a beach holiday with the sea above 21 °C, go in September. For sightseeing, day trips and hiking, conditions are most comfortable from April to May and from September to November. Rain is most frequent from June to August; the wettest month is June with 372 mm.
Kumamoto through the seasons
How the weather changes over the seasons, with averages for each.
Kumamoto in spring
Mar – May
Good
- 14–23 °C by day
- Sea 16 °C
- 6 h of sun a day
- 34 rainy days in all
Kumamoto in summer
Jun – Aug
Fair
- 26–30 °C by day
- Sea 25 °C
- 5 h of sun a day
- 46 rainy days in all
Kumamoto in autumn
Sep – Nov
Good
- 17–28 °C by day
- Sea 23 °C
- 5 h of sun a day
- 27 rainy days in all
Kumamoto in winter
Dec – Feb
Poor
- 9–11 °C by day
- Sea 14 °C
- 4 h of sun a day
- 25 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Kumamoto for you.
Your best months: May, October
Based on the climate averages; tap a month to see its details.
Compare two months in Kumamoto
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
October has the better holiday weather in Kumamoto: score 80 against 74. In April, days are 4 °C cooler than in October. The sea is 7 °C cooler in April. April has 3 more rainy days.
| Month | October | April |
|---|---|---|
| Weather score | 80better | 74 |
| Day high | 23° | 19° |
| Night low | 16° | 11° |
| Sea | 23.4° | 16.2° |
| Sunshine | 5.4 h | 5.7 h |
| Rainy days | 8better | 11 |
| Rainfall | 101 mmbetter | 135 mm |
| Muggy days | 6 | 1better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Sep
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – May, Sep – Nov
15–28 °C and not too much rain
Rainy months
Jun – Aug
12 or more rainy days
Kumamoto month by month
The typical weather for every month at a glance.
29January9° · Sea 14° · 4 h
In January, Kumamoto is cold: daytime highs average 9 °C, and nights cool down to about 3 °C. The sea averages 13.9 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain falls on about 8 days, adding up to 62 mm. All in all, January is not an ideal month for a holiday in Kumamoto.
Kumamoto in January38February11° · Sea 13° · 4 h
In February, Kumamoto is cool: daytime highs average 11 °C, and nights cool down to about 4 °C. The sea averages 12.8 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 87 mm in total. All in all, February is not an ideal month for a holiday in Kumamoto.
Kumamoto in February53March14° · Sea 14° · 5 h
In March, Kumamoto is cool: daytime highs average 14 °C, and nights cool down to about 6 °C. The sea averages 13.8 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 127 mm in total. All in all, March is a so-so month for a holiday in Kumamoto.
Kumamoto in March74April19° · Sea 16° · 6 h
In April, Kumamoto is mild: daytime highs average 19 °C, and nights cool down to about 11 °C. The sea averages 16.2 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 135 mm in total. All in all, April is a good month for a holiday in Kumamoto.
Kumamoto in April74May23° · Sea 19° · 6 h
In May, Kumamoto is warm: daytime highs average 23 °C, and nights cool down to about 15 °C. The sea averages 19.1 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 183 mm in total. All in all, May is a good month for a holiday in Kumamoto.
Kumamoto in May56June26° · Sea 22° · 4 h
In June, Kumamoto is warm: daytime highs average 26 °C, and nights cool down to about 20 °C. The sea averages 22.4 °C – refreshing for a swim. The sun is scarce, with only about 4 hours a day. It rains often – on about 16 days, adding up to 372 mm. The air is often humid and muggy. All in all, June is a so-so month for a holiday in Kumamoto.
Kumamoto in June46July29° · Sea 26° · 5 h
In July, Kumamoto is hot: daytime highs average 29 °C, and even at night it stays warm at around 23 °C. The sea averages 25.8 °C – pleasant for swimming. Expect around 5 hours of sunshine a day. It rains often – on about 17 days, adding up to 314 mm. On about 13 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in Kumamoto.
Kumamoto in July49August30° · Sea 28° · 6 h
In August, Kumamoto is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 27.8 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 185 mm in total. On about 19 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a so-so month for a holiday in Kumamoto.
Kumamoto in August68September28° · Sea 27° · 5 h
In September, Kumamoto is hot: daytime highs average 28 °C, and even at night it stays warm at around 21 °C. The sea averages 26.6 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 163 mm in total. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Kumamoto.
Kumamoto in September80October23° · Sea 23° · 5 h
In October, Kumamoto is warm: daytime highs average 23 °C, and nights cool down to about 16 °C. The sea averages 23.4 °C – pleasant for swimming. Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 101 mm. All in all, October is an excellent month for a holiday in Kumamoto.
Kumamoto in October72November17° · Sea 20° · 5 h
In November, Kumamoto is mild: daytime highs average 17 °C, and nights cool down to about 10 °C. The sea averages 19.7 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 94 mm. All in all, November is a good month for a holiday in Kumamoto.
Kumamoto in November42December11° · Sea 16° · 4 h
In December, Kumamoto is cool: daytime highs average 11 °C, and nights cool down to about 5 °C. The sea averages 16.3 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain falls on about 8 days, adding up to 66 mm. All in all, December is a so-so month for a holiday in Kumamoto.
Kumamoto in DecemberKumamoto compared
Put Kumamoto side by side with another destination.
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Kumamoto vs. Nagasaki
In October the holiday weather in Kumamoto and Nagasaki is about equally good (score 80 vs. 81). During the day it is about as warm in Nagasaki as in Kumamoto. The sea in Nagasaki is 1 °C warmer. Nagasaki gets one more hour of sunshine a day.
| in October | Kumamoto | Nagasaki |
|---|---|---|
| Holiday score | 80 | 81 |
| Daytime high | 23° | 23° |
| Sea | 23° | 24° |
| Sunshine | 5 h | 6 h |
| Rainy days | 8 | 8 |
| Best time | Apr – May, Sep – Nov | Apr – May, Sep – Nov |
Through the year
Japan in October: the best places
In October, Kumamoto ranks 4 among the 31 nearest destinations in this country.
- Nagasaki23°24°81
- 2Fukuoka22°23°81
- 3Hiroshima22°23°81
- 4KumamotoThis page23°23°80
- 5Kitakyūshū22°23°79
- 6Okayama22°24°78
- 7Kagoshima24°26°77
- 8Okinawa26°27°77
Planning a trip to Kumamoto
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Kumamoto in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Kumamoto has its best school-holiday weather during October half-term (score 80) and its weakest during the Christmas holidays (score 36).
- 68
Easter holidays
Mar – Apr
Good
- 18 °C by day
- Sea 15 °C
- 5.5 h of sun a day
- 11 rainy days a month
- 70
May half-term
May – Jun
Good
- 24 °C by day
- Sea 20 °C
- 5.5 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 48
Summer holidays
Jul – Aug
Fair
- 30 °C by day
- Sea 27 °C
- 5.7 h of sun a day
- 14 rainy days a month
Keep in mind: Frequent rain, Storm season
- 80
October half-term
Oct
ExcellentBest holidays
- 23 °C by day
- Sea 23 °C
- 5.4 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
Keep in mind: Storm season
- 36
Christmas holidays
Dec – Jan
Poor
- 10 °C by day
- Sea 15 °C
- 3.7 h of sun a day
- 8 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h 55 min
- Distance
- 9,500 km
- Time zone
- UTC+9
- Jet lag
- About 8 days (8 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
Kumamoto lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about Kumamoto
When is the best time to visit Kumamoto?
The best time to visit Kumamoto is from April to May and from September to November. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Kumamoto?
The sea temperature in Kumamoto ranges from 12.8 °C in February to 27.8 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
Can you swim in Kumamoto in October?
Yes. In October the sea averages 23.4 °C – pleasant for swimming.
What is the warmest month in Kumamoto?
August is the warmest month, with average highs of 30 °C and nights around 24 °C. January is the coolest month at 9 °C.
When does it rain most in Kumamoto?
Rain is most frequent from June to August; the wettest month is June with 372 mm. The driest month is January with 62 mm.
How many hours of sunshine does Kumamoto get?
Kumamoto gets around 1,780 hours of sunshine a year. The sunniest month is August with 6.0 hours a day; in January there are 3.5 hours a day.
What time zone is Kumamoto in?
Kumamoto uses the time zone Asia/Tokyo, at UTC+9 all year.
How long is the flight from London to Kumamoto?
A nonstop flight from London to Kumamoto takes about 11 h 55 min, for a straight-line distance of about 9,500 km. Most routes need a change of planes, which adds time.
When is typhoon season in Kumamoto?
Kumamoto lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Kumamoto?
Kumamoto has its best school-holiday weather during October half-term (score 80) and its weakest during the Christmas holidays (score 36). Holiday ratings (0–100): Easter holidays 68, May half-term 70, Summer holidays 48, October half-term 80, Christmas holidays 36.
Near Kumamoto
Other destinations close by.
Places with a climate like Kumamoto
Destinations whose weather through the year is closest to Kumamoto's – good alternatives.