Belleville Weather in December
What's the weather like in Belleville (Ontario) in December 2025?
The climate in Belleville during December can be summarized as cold and a little damp.
December is in the winter in Belleville and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing -1°C (31°F), whilst at night -9°C (16°F) is normal.
| Daytime temperature | -0.8°C 30.6°F |
|---|---|
| Nightly temperature | -9°C 15.8°F |
| Average temperature | -4.9°C 23.2°F |
| Daily sunshine | 3 hrs |
| Avg rainfall | 84 mm 3.3 ins |
| Rainy days | 14 days |
| Sea temperature | 5.2°C 41.3°F |
| Humidity | 80% |
| Windspeed | 16.6kph 10 mph |
On average December is the 2nd wettest month of the year in Belleville with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 3 hours of sunshine per day.
December temperatures in Belleville
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 Belleville in December 2025.
Other monthly averages
Best places to visit in December
Belleville weather stats
| Hottest month: | July | 25.9°C 78.6°F |
|---|---|---|
| Driest month: | July | 55mm 2.2ins |
| Sunniest month: | July | 10.1hrs |
| Coldest month: | January | -3.6°C 25.5°F |
| Wettest month: | November | 88mm 3.5ins |
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