CastleKyushu Weather Guide
Kumamoto & Aso Weather & What to Wear
Kumamoto, Kumamoto Castle, Aso, Kurokawa Onsen
This area covers Kumamoto City, home to Kumamoto Castle; Aso, where grasslands spread across a huge caldera; and Kurokawa Onsen in the mountains. Summers in Kumamoto City are fiercely hot, with an average August high of 33.3°C. Meanwhile, the Aso highlands (Aso-Otohime) have an annual average temperature of 13.2°C, about 4°C lower than Kumamoto City (17.2°C), and drop below freezing in winter (temperatures are for Kumamoto City).
- January low
- 1.6℃
- August high
- 33.3℃
- Max snow depth
- 1cm
Forecast
Forecast: Today & the Next 7 Days
JMA forecast issued Oct 22, 11 AM
Every 3 Hours: Today & Tomorrow
- Today12 PMSunny22°☂ 0%3–5m/s
- 3 PMSunny25°☂ 0%3–5m/s
- 6 PMSunny21°☂ 0%3–5m/s
- 9 PMSunny19°☂ 0%3–5m/s
- Tomorrow12 AMSunny18°☂ 0%0–2m/s
- 3 AMSunny17°☂ 0%3–5m/s
- 6 AMCloudy17°☂ 10%3–5m/s
- 9 AMCloudy21°☂ 10%3–5m/s
- 12 PMCloudy24°☂ 40%3–5m/s
- 3 PMCloudy24°☂ 40%3–5m/s
- 6 PMRain22°☂ 70%3–5m/s
- 9 PMRain20°☂ 70%3–5m/s
Weather and wind are for the wider area; temperature is for the main forecast point. Chance of rain is for the 6-hour period.
- Today10/22(Thu)Sunny26°/14°Observed: 14°☂ 0%
- Tomorrow10/23(Fri)Cloudy, then rain25°/16°☂ 70%
- 10/24(Sat)Rain27°/19°☂ 80%
- 10/25(Sun)Cloudy, rain at times30°/23°☂ 70%Reliability C
- 10/26(Mon)Cloudy, rain at times28°/22°☂ 70%Reliability B
- 10/27(Tue)Cloudy25°/16°☂ 40%Reliability C
- 10/28(Wed)Sunny, cloudy at times23°/13°☂ 20%Reliability A
- ☂ Chance of rain
- From day 3, the weekly forecast covers a wider prefecture-level area.
- Reliability of the weekly forecast (A: high, B: fairly high, C: fairly low)
- "Observed" is the temperature measured so far today by JMA weather stations (AMeDAS), not a forecast.
- Source: Japan Meteorological Agency (weather forecast)
Best Season
Best Time to Visit Kumamoto & Aso
To escape the summer heat
Aso-Otohime's average August high is 29.3°C, about 4°C lower than Kumamoto City (33.3°C). A great season for a drive to Daikanbo or Kusasenri.
Climate
Kumamoto & Aso Temperature & Snow Through the Year
Monthly high / low temperature (°C)
HighLow
Monthly max snow depth (cm)
Month by Month
Month-by-Month Weather & What to Wear
| Month | High | Low | Precip. | Max snow depth | What to wear |
|---|---|---|---|---|---|
| Jan | 10.7℃ | 1.6℃ | 57.2mm | 1cm | Warm jacketLight down or winter coat, sweater |
| Feb | 12.4℃ | 2.6℃ | 83.2mm | — | Warm jacketLight down or winter coat, sweater |
| Mar | 16.1℃ | 5.9℃ | 124.8mm | — | Long sleeves + jacketLong sleeves with a light jacket or hoodie |
| Apr | 21.4℃ | 10.6℃ | 144.9mm | — | T-shirt + layerT-shirt, plus light long sleeves for mornings and evenings |
| May | 26.0℃ | 15.6℃ | 160.9mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Jun | 28.1℃ | 20.2℃ | 448.5mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Jul | 31.8℃ | 24.2℃ | 386.8mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Aug | 33.3℃ | 24.8℃ | 195.4mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Sep | 30.1℃ | 21.2℃ | 172.6mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Oct | 25.0℃ | 14.9℃ | 87.1mm | — | T-shirtT-shirt, with a light layer for evenings and air conditioning |
| Nov | 18.8℃ | 8.8℃ | 84.4mm | — | Long sleeves + jacketLong sleeves with a light jacket or hoodie |
| Dec | 12.9℃ | 3.4℃ | 61.2mm | — | Warm jacketLight down or winter coat, sweater |
Clothing tips are based on the normal high temperature and snow depth. Bring an extra layer for mornings and evenings.
Where to Stay · Agoda
Places to Stay near Kumamoto & AsoPR
PR9.3レフ熊本 by ベッセルホテルズ
★★★★Check rates on Agoda10,026 reviews0.5 km from center
PR9.5ザ ブラッサム熊本
★★★★Check rates on Agoda4,800 reviews2.3 km from center
PR8.8天然温泉 六花の湯 ドーミーイン熊本
★★★★Check rates on Agoda9,246 reviews0.7 km from center
PR8.6三井ガーデンホテル熊本
★★★★Check rates on Agoda11,064 reviews0.6 km from center
PR8.7KOKO HOTEL 熊本上通
★★★Check rates on Agoda5,636 reviews0.5 km from center
PR9.1ホテル日航熊本
★★★★★Check rates on Agoda3,410 reviews0.4 km from center
Prices and availability are shown on Agoda.
Seasons
Kumamoto & Aso Through the Seasons
🌸
Spring
Mar–MayControlled burning of Aso's grasslands usually takes place in February and March, a seasonal winter tradition. Cherry blossoms usually open around March 22, and April highs in Kumamoto City are around 21°C.
☀️
Summer
Jun–AugThe rainy season usually runs from around June 4 to around July 19, and June is very wet, with 448.5 mm of rain. After the rainy season, Kumamoto City highs are around 32–33°C.
🍁
Autumn
Sep–NovKumamoto City highs are around 25°C in October and around 19°C in November. Aso is much colder than the city, so bring a jacket.
❄️
Winter
Dec–FebKumamoto City highs are around 11–13°C, with mornings around 2°C. Aso-Otohime has an average January high of 7.1°C and mornings below freezing at -2.7°C, so watch out for snow and icy roads.
Cherry Blossoms
Cherry Blossoms in Kumamoto & Aso
CastleWinter Scenery
Winter Scenery in Kumamoto & Aso
Rime ice
Frozen waterfall & iciclesOnsen
Onsen towns in Kumamoto & Aso
♨ OnsenKurokawa Onsen
Kyushu ・ Minamioguni, Aso District, Kumamoto
♨ Day use Adults ¥800, children ¥600 (as of October 2026)
Private baths
Autumn Leaves
Autumn Leaves in Kumamoto & Aso
GorgeAttractions
Attractions in Kumamoto & Aso
ZooAso Cuddly Dominion
Kyushu ・ Kumamoto & Aso
A zoo in Aso City where you can interact with 350 animals of 60 species. It centers on animal shows and close-contact facilities with bear cubs, capybaras, and penguins. It's about 1.5 km from JR Aso Station, and highway buses between Kumamoto and Oita/Beppu stop in front of the park.
Airport Access
Getting to Kumamoto & Aso from the airport
Compare trains, buses and taxis from the airport by travel time and fare.
Travel Passes
Travel passes you can use in Kumamoto & Aso
🚄 JRJR KYUSHU RAIL PASS (All Kyushu / Northern Kyushu / Southern Kyushu)
Kyushu ・ 3, 5 or 7 consecutive days (Southern Kyushu is 3 days only; Northern Kyushu is 3 or 5 days)
From ¥22,000
🚌 BusSUNQ PASS
Kyushu ・ Paper passes are valid for 3 or 4 consecutive days. Digital passes: the 3-day pass covers any 3 days within 5 days from the start date, and the 4-day pass any 4 days within 7 days (each day runs from 3:00 to 26:59)
🚄 JRJapan Rail Pass
Nationwide ・ Three types: 7, 14 or 21 days. The period of use cannot be extended or changed
From ¥50,000
Getting Around
Getting to and from Kumamoto & Aso
Fukuoka (Hakata) → Kumamoto
Fastest: Fastest 32 min (about 40 min on the Sakura)
🚄 Shinkansen🚌 Highway bus
Plan Your Trip
Plan Your Kumamoto & Aso TripPR
🏨Hotels in KumamotoCompare places to stay in the Kumamoto & Aso areaHotels.com♨️Tours & onsen experiencesHot spring inns in Beppu, Yufuin, Kurokawa, Ureshino, Ibusuki and moreKlook🎫Kumamoto tours & activitiesSightseeing tours and activities in Kumamoto & AsoKlook📱eSIM for JapanGet online as soon as you landAiralo
Other Areas
Weather in Other Areas
Source: Japan Meteorological Agency (climate normals 1991-2020). Compiled by tripuuu.log. Temperature and snow figures are normals from the Kumamoto station; actual weather varies from year to year.
