CanadaThe weather in December in Thunder Bay
It's cold in December in Thunder Bay with an average temperature of -3°C. Temperatures this month range from a low of -9°C to a high of 2°C. At night, you can expect temperatures between -18°C and -6°C.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Thunder Bay, Canada. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 13°C in 2023, Thunder Bay reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was -24°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of -31°C to a highest value of 4°C.
Precipitation and snowfall
In December, there is an average of 48 mm of precipitation, spread over 9 days. Of the total precipitation, about 22 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in December for Thunder Bay
Click on any day in December to get detailed info about the usual weather on that day in Thunder Bay. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Thunder Bay | New York | |
|---|---|---|
| Average temperature | -3°C | 9°C |
| Max. temperature | 2°C | 12°C |
| Min. temperature | -18°C | -5°C |
| Total precipitation | 48 mm | 133 mm |
| Rainy days | 9 days | 17 days |
| Total snowfall | 22 cm | 9,7 cm |
| Snowy days | 11 days | 3 days |
Start of December
The month of December starts in Thunder Bay with really cold temps, averaging around -1°C during the day and nights dipping to about -9°C.
Mid December
By mid-December, daytime temps drop to around -3°C, with nights around -11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of December
By the end of December, the average daytime temperature in Thunder Bay is around -5°C, while nighttime temps are about -13°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Check out the climate of Thunder Bay for all months and discover the best travel time
Curious about the weather in other parts of Canada? Check out the climate and weather for spots like Vancouver, Toronto, Niagara Falls, or explore other destinations in Canada.
Temperature charts
These charts show the average temperatures in December in Thunder Bay, Canada. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Thunder Bay
Temperature in December in Thunder Bay over the years
Precipitation charts
These charts show the average amount of precipitation in December in Thunder Bay, Canada. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Thunder Bay
Total precipitation in December in Thunder Bay over the years
Daily Snowfall in December in Thunder Bay
Snowfall in December in Thunder Bay per year
Daily UV index in December in Thunder Bay
This chart shows the average daily UV index in December in Thunder Bay, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Thunder Bay
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Average weather in Thunder Bay by month
Click on a month below to see detailed weather info for Thunder Bay. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.