The weather in Kumamoto in August is very hot. The average temperatures are between 77°F and 86°F, 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.
Temperatures
86° / 77°
Rainy Days
10
Snowy Days
0
Dry Days
21
Rainfall
12.4
in
Sun Hours
11.0
Hrs
