Thunder Bay Weather in December
What's the weather like in Thunder Bay (Ontario) in December 2024?
The climate in Thunder Bay during December can be summarized as very cold and reasonably dry.
December is in the winter in Thunder Bay and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing -6°C (21°F), whilst at night -16°C (3°F) is normal.
| Daytime temperature | -6.2°C 20.9°F |
|---|---|
| Nightly temperature | -16.3°C 2.8°F |
| Average temperature | -11.2°C 11.8°F |
| Daily sunshine | 3.4 hrs |
| Avg rainfall | 45 mm 1.8 ins |
| Rainy days | 11 days |
| Sea temperature | 3.7°C 38.7°F |
| Humidity | 73% |
| Windspeed | 13kph 8 mph |
On average December is the 5th driest month of the year in Thunder Bay with around 45mm 1.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 3.4 hours of sunshine per day.
December temperatures in Thunder Bay
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 Thunder Bay in December 2024.
Other monthly averages
Best places to visit in December
Thunder Bay weather stats
| Hottest month: | July | 23.4°C 74.1°F |
|---|---|---|
| Driest month: | February | 27mm 1.1ins |
| Sunniest month: | July | 10.3hrs |
| Coldest month: | January | -9.5°C 14.9°F |
| Wettest month: | August | 88mm 3.5ins |
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