Muroran Weather in January
What's the weather like in Muroran (Hokkaidō) in January 2026?
The climate in Muroran during January can be summarized as cold and a little damp.
January is in the winter in Muroran and is typically the coldest month of the year. Daytime maximum temperatures average around a freezing -1°C (30°F), whilst at night -8°C (18°F) is normal.
| Daytime temperature | -1.3°C 29.7°F |
|---|---|
| Nightly temperature | -7.9°C 17.9°F |
| Average temperature | -4.6°C 23.8°F |
| Daily sunshine | 3 hrs |
| Avg rainfall | 83 mm 3.3 ins |
| Rainy days | 28 days |
| Sea temperature | 6.8°C 44.3°F |
| Humidity | 73% |
| Windspeed | 16kph 10 mph |
On average January is the 3rd driest month of the year in Muroran with around 83mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 28 days, although this may vary considerably.
On the flip side this corresponds to an average of 3 hours of sunshine per day.
January temperatures in Muroran
January rainfall
January 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 January 2025.
Other monthly averages
Best places to visit in January
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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