Ishikari Weather in December
What's the weather like in Ishikari (Hokkaidō) in December 2025?
The climate in Ishikari during December can be summarized as cold and damp.
December is in the winter in Ishikari and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing 2°C (35°F), whilst at night -5°C (23°F) is normal.
| Daytime temperature | 1.6°C 34.8°F |
|---|---|
| Nightly temperature | -5.2°C 22.7°F |
| Average temperature | -1.8°C 28.8°F |
| Daily sunshine | 2.5 hrs |
| Avg rainfall | 116 mm 4.6 ins |
| Rainy days | 28 days |
| Sea temperature | 8.4°C 47.2°F |
| Humidity | 74% |
| Windspeed | 10.4kph 7 mph |
On average December is the 4th wettest month of the year in Ishikari with around 116mm 4.6 inches of rain making it a 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 2.5 hours of sunshine per day.
December temperatures in Ishikari
December rainfall
December 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 Ishikari in December 2025.
Other monthly averages
Best places to visit in December
Ishikari weather stats
| Hottest month: | August | 25.7°C 78.3°F |
|---|---|---|
| Driest month: | May | 58mm 2.3ins |
| Sunniest month: | April | 6.4hrs |
| Coldest month: | January | -1.8°C 28.8°F |
| Wettest month: | August | 142mm 5.6ins |
© Google
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