Kumamoto Weather in August
With daytime temperatures of 32°C (90°F) and nighttime lows of 24°C (75°F), August in Kumamoto brings very high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 148 mm (5.8 in) falls on average.
Rainfall in Kumamoto in August
Rain is expected on roughly 18 days, totalling around 148 mm (5.8 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Kumamoto in August
August in Kumamoto brings very high temperatures, with highs of 32°C (90°F) and nights around 24°C (75°F). For most visitors, the main thing to prepare for is the heat during the day. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about. The average temperatures are warm, but some days will be hotter. Make sure to dress in light, breathable clothing and drink plenty of water.
Sunshine in Kumamoto in August
With approximately 208 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If your ideal day consists of dry skies and pleasant temperatures, October typically offers the best circumstances for Kumamoto.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Kumamoto's climate page.
Kumamoto Temperature in August
Min Temperature
24°C (75°F)
Max Temperature
32°C (90°F)
Chance of Rain
59%
Precipitation
148 mm (5.8 in)
Rainy days
18 days
Humidity
72%
Sunshine
208 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kumamoto typically stay consistent throughout August, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Kumamoto in August
Browse day-by-day weather records for Kumamoto spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kumamoto historical weather extremes in August
Based on weather observations in Kumamoto between 1976 and 2025, these are the recorded extremes during August.
- The hottest August day on record in Kumamoto reached 39°C (102°F) (August 4, 2024).
- On August 25, 2019, Kumamoto saw its coldest August day with temperatures maxing out at 22°C (72°F).
- The coldest night in August in Kumamoto was on August 8, 1991, with a minimum of 16°C (61°F).
Best Places in Japan in August
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in August →
perfect weather
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tolerable
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What to Wear in Kumamoto in August
Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Kumamoto in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Kumamoto's climate page.
Temperature Rainfall Sunshine Humidity
See the full Kumamoto climate overview or explore weather in Japan.
