Kumamoto weather in August
August is a fair month to visit Kumamoto: highs of 30°C (86°F) and about 213 mm (8.4 in) of rain on average. Nights average 23°C (73°F) and cloud cover 63% (NASA POWER, 2001–2025 averages). The sea averages 30°C (86°F). It is the 3rd wettest month of the year and the warmest. Compared with July, it is warmer and drier; September brings highs of 27°C (80°F) and 207 mm (8.1 in) of rain.
Is August a good time to visit Kumamoto?
fair month Weather score 52/100.
August is a fair month in Kumamoto. The weather is usually best in Oct–Nov.
Does it rain a lot in Kumamoto in August?
Yes, it is one of the rainy months: about 213 mm (8.4 in) falls in an average August. It is the 3rd wettest month of the year.
How warm is Kumamoto in August?
Days average 30°C (86°F) and nights 23°C (73°F).
Kumamoto weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 8°C (47°F) | 0°C (33°F) | 69 mm | 69% | 12°C (53°F) | least pleasant |
| February | 10°C (51°F) | 1°C (34°F) | 101 mm | 66% | 11°C (51°F) | least pleasant |
| March | 14°C (56°F) | 4°C (39°F) | 130 mm | 65% | 12°C (53°F) | fair |
| April | 19°C (65°F) | 9°C (47°F) | 157 mm | 65% | 16°C (60°F) | fair |
| May | 23°C (74°F) | 13°C (56°F) | 182 mm | 69% | 19°C (67°F) | fair |
| June | 26°C (79°F) | 18°C (64°F) | 383 mm | 81% | 23°C (74°F) | least pleasant |
| July | 29°C (84°F) | 22°C (72°F) | 394 mm | 71% | 28°C (83°F) | least pleasant |
| August | 30°C (86°F) | 23°C (73°F) | 213 mm | 63% | 30°C (86°F) | fair |
| September | 27°C (80°F) | 19°C (66°F) | 207 mm | 64% | 29°C (84°F) | fair |
| October | 22°C (71°F) | 13°C (56°F) | 117 mm | 55% | 25°C (77°F) | best |
| November | 16°C (61°F) | 8°C (46°F) | 96 mm | 58% | 20°C (69°F) | best |
| December | 10°C (51°F) | 2°C (36°F) | 82 mm | 64% | 16°C (60°F) | fair |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months