Kumamoto, Japan climate
Average temperatures, precipitation and all-time records for Kumamoto, Japan, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 30°C, and its coldest is January, with an average low of 3°C.
Kumamoto is the capital city of Kumamoto Prefecture on the island of Kyushu, Japan. As of June 1, 2019, the city has an estimated population of 738,907 and a population density of 1,893 people per km2. The total area is 390.32 km2. via Wikipedia
How today compares
Latest recorded day: 2026-07-24. Each reading placed on Kumamoto, Japan's own ±7-day seasonal distribution.
Kumamoto average temperatures by month
Typical daily high and low, and average precipitation, for each month in Kumamoto, Japan, based on 1980–2026 records. The wettest month is June (15 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 9°C | 3°C | 3 mm |
| February | 10°C | 4°C | 5 mm |
| March | 13°C | 7°C | 5 mm |
| April | 18°C | 11°C | 5 mm |
| May | 22°C | 15°C | 8 mm |
| June | 25°C | 20°C | 15 mm |
| July | 29°C | 24°C | 8 mm |
| August | 30°C | 24°C | 5 mm |
| September | 27°C | 21°C | 5 mm |
| October | 23°C | 16°C | 3 mm |
| November | 17°C | 10°C | 3 mm |
| December | 11°C | 5°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 35°C on 2025-07-30
- Coldest day on record: -9°C on 1981-01-22
Percentiles compare each day to Kumamoto, Japan's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →