Muroran Weather in August
What's the weather like in Muroran (Hokkaidō) in August 2025?
The climate in Muroran during August can be summarized as warm, humid and wet.
August is in the summer in Muroran and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 24°C (75°F), whilst at night 17°C (63°F) is normal.
| Daytime temperature | 23.7°C 74.6°F |
|---|---|
| Nightly temperature | 17.1°C 62.7°F |
| Average temperature | 20.4°C 68.7°F |
| Daily sunshine | 5.3 hrs |
| Avg rainfall | 181 mm 7.1 ins |
| Rainy days | 19 days |
| Sea temperature | 21.7°C 71.1°F |
| Humidity | 84% |
| Windspeed | 11kph 7 mph |
On average August is the wettest month of the year in Muroran with around 181mm 7.1 inches of rain making it a wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.3 hours of sunshine per day.
August temperatures in Muroran
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 Muroran in August 2025.
Other monthly averages
Best places to visit in August
Muroran weather stats
| Hottest month: | August | 23.5°C 74.3°F |
|---|---|---|
| Driest month: | February | 66mm 2.6ins |
| Sunniest month: | October | 5.6hrs |
| Coldest month: | January | -1.4°C 29.5°F |
| Wettest month: | August | 181mm 7.1ins |
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