Click on a day for an hourly weather forecast
The weather in Kumamoto in August is very hot. The average temperatures are between 25°C and 30°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of August in Kumamoto. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Kumamoto in August 2025.
If you’re planning to visit Kumamoto in the near future, we highly recommend that you review the 14 day weather forecast for Kumamoto before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / 4° | 7 | 19 | 6 | 111 mm | Awful | Kumamoto in January |
| February | 11° / 5° | 7 | 17 | 4 | 164 mm | Awful | Kumamoto in February |
| March | 14° / 8° | 8 | 22 | 1 | 187 mm | Ok | Kumamoto in March |
| April | 19° / 12° | 7 | 23 | 0 | 183 mm | Ok | Kumamoto in April |
| May | 23° / 16° | 7 | 24 | 0 | 243 mm | Good | Kumamoto in May |
| June | 25° / 20° | 12 | 18 | 0 | 534 mm | Good | Kumamoto in June |
| July | 28° / 24° | 14 | 17 | 0 | 507 mm | Good | Kumamoto in July |
| August | 30° / 25° | 10 | 21 | 0 | 315 mm | Ok | Kumamoto in August |
| September | 28° / 22° | 8 | 22 | 0 | 254 mm | Good | Kumamoto in September |
| October | 23° / 17° | 5 | 26 | 0 | 138 mm | Perfect | Kumamoto in October |
| November | 18° / 12° | 5 | 25 | 0 | 143 mm | Good | Kumamoto in November |
| December | 11° / 6° | 7 | 21 | 3 | 124 mm | Awful | Kumamoto in December |