Ōtsuki Weather in August
What's the weather like in Ōtsuki (Yamanashi) in August 2025?
The climate in Ōtsuki during August can be summarized as hot, humid and very wet.
August is in the summer in Ōtsuki and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 28°C (82°F), whilst at night 19°C (66°F) is normal.
| Daytime temperature | 27.8°C 82°F |
|---|---|
| Nightly temperature | 18.6°C 65.5°F |
| Average temperature | 23.2°C 73.8°F |
| Daily sunshine | 5.8 hrs |
| Avg rainfall | 234 mm 9.2 ins |
| Rainy days | 18 days |
| Sea temperature | 26.8°C 80.3°F |
| Humidity | 81% |
| Windspeed | 7.6kph 5 mph |
On average August is the wettest month of the year in Ōtsuki with around 234mm 9.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.8 hours of sunshine per day.
August temperatures in Ōtsuki
August rainfall
August hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ōtsuki in August 2025.
Other monthly averages
Best places to visit in August
Ōtsuki weather stats
| Hottest month: | August | 27.6°C 81.7°F |
|---|---|---|
| Driest month: | December | 32mm 1.3ins |
| Sunniest month: | January | 6.8hrs |
| Coldest month: | January | 5.5°C 41.9°F |
| Wettest month: | August | 234mm 9.2ins |
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