Japan
Kumamoto sees feels-like daytime highs peak around 40.5°C in August and nighttime lows bottom out near 2.2°C in January. June is the wettest month (~340 mm), while January is the driest (~56 mm). For sunshine, December leads with about 71% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are October, May, and April — expect around 17.6–27.8°C with roughly 26% chance of rain on a given day in October.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | 2.2° / 9.3° | 19% | 56 mm | 65% | 11 kph |
| February | 3.3° / 10.5° | 24% | 81 mm | 59% | 11.2 kph |
| March | 7.1° / 15.3° | 35% | 130 mm | 51% | 10.9 kph |
| April☀ | 12.9° / 21.8° | 36% | 149 mm | 46% | 10 kph |
| May☀ | 19.4° / 28.8° | 37% | 193 mm | 42% | 8.8 kph |
| June | 24.9° / 32.8° | 51% | 340 mm | 31% | 8.6 kph |
| July | 30.3° / 37.8° | 51% | 319 mm | 33% | 8.6 kph |
| August | 31° / 40.5° | 46% | 196 mm | 44% | 8.3 kph |
| September | 25.3° / 34.7° | 38% | 168 mm | 53% | 8.6 kph |
| October☀ | 17.6° / 27.8° | 26% | 109 mm | 66% | 9.1 kph |
| November | 10.7° / 19.5° | 23% | 75 mm | 70% | 9.6 kph |
| December | 4.7° / 12° | 20% | 56 mm | 71% | 10.4 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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