Ōtsu Weather in August
What's the weather like in Ōtsu (Shiga) in August 2025?
The climate in Ōtsu during August can be summarized as hot, humid and wet.
August is in the summer in Ōtsu and is typically the warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 23°C (73°F) is normal.
| Daytime temperature | 31.5°C 88.7°F |
|---|---|
| Nightly temperature | 22.7°C 72.9°F |
| Average temperature | 27.1°C 80.8°F |
| Daily sunshine | 6.5 hrs |
| Avg rainfall | 121 mm 4.8 ins |
| Rainy days | 17 days |
| Sea temperature | 27.1°C 80.8°F |
| Humidity | 74% |
| Windspeed | 8.6kph 5 mph |
On average August is the 6th wettest month of the year in Ōtsu with around 121mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
August temperatures in Ōtsu
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 Ōtsu in August 2025.
Other monthly averages
Best places to visit in August
Ōtsu weather stats
| Hottest month: | August | 31.3°C 88.3°F |
|---|---|---|
| Driest month: | December | 68mm 2.7ins |
| Sunniest month: | August | 6.5hrs |
| Coldest month: | January | 6.7°C 44.1°F |
| Wettest month: | June | 224mm 8.8ins |
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