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December 15th, 2025 :: 1:43 am EST   

Local Weather Report for
Thunder Bay
Ontario, Canada

 Current Thunder Bay Weather Conditions Updated December 15th at 1:00 am 
light snow
Temperature:-8°C Dew Point:-10°C
Barometer:101.8 kPa Wind:N 21 Km/h
Humidity:85.0% Visibility:0 Km
 
 Thunder Bay Weather Forecast Summary  
 
Today
Dec 15th
Tuesday
Dec 16th
Wednesday
Dec 17th
Thursday
Dec 18th
Friday
Dec 19th
Flurries Cloudy Cloudy Mix of rain and snow Cloudy
-8°C
5°C
-7°C
-2°C
-12°C
1°C
-15°C
-7°C
-18°C
 
 Thunder Bay Detailed Weather Forecast  
 
Monday, December 15th, 2025
Overnight Temperature: -10°C
Cloudy with flurries likely. Windy at times.
Morning Temperature: -10°C
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: -9°C
A mix of cloud and sun.
Evening Temperature: -11°C
Cloudy.
Tuesday, December 16th, 2025
Overnight Temperature: -5°C
Cloudy. Windy.
Morning Temperature: -1°C
Cloudy. Windy.
Afternoon Temperature: 0°C
Cloudy. Windy.
Evening Temperature: 2°C
Cloudy with a slight chance of showers. Showers possibly mixed with wet flurries. Wind 40 to 60 km/h.
Wednesday, December 17th, 2025
Overnight Temperature: -9°C
Cloudy. Wind 30 to 50 km/h.
Morning Temperature: -11°C
Sunny. Windy at times.
Afternoon Temperature: -6°C
Cloudy. Windy at times.
Evening Temperature: -2°C
Cloudy with a chance of flurries. Windy.
Thursday, December 18th, 2025
Overnight Temperature: 0°C
Cloudy with flurries or showers likely. Wind 30 to 50 km/h.
Morning Temperature: 0°C
Cloudy with flurries or showers likely.
Afternoon Temperature: -9°C
Cloudy with flurries likely. Wind 50 to 70 km/h.
Evening Temperature: -14°C
Cloudy with a chance of flurries. Wind 40 to 60 km/h.
Friday, December 19th, 2025
Overnight Temperature: -16°C
Cloudy with clear periods. Windy.
Morning Temperature: -16°C
Mostly sunny. Windy at times.
Afternoon Temperature: -13°C
Cloudy.
Evening Temperature: -8°C
Cloudy with a chance of flurries. Windy.
Saturday, December 20th, 2025
Overnight Temperature: -5°C
Cloudy with flurries likely. Windy.
Morning Temperature: -7°C
A mix of cloud and sun with a chance of flurries. Windy at times.
Afternoon Temperature: -10°C
A mix of cloud and sun. Windy.
Evening Temperature: -15°C
Mostly clear. Windy at times.
Sunday, December 21st, 2025
Overnight Temperature: -16°C
Clear with cloudy periods. Windy at times.
Morning Temperature: -16°C
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: -15°C
Sunny with cloudy periods.
Evening Temperature: -15°C
A mix of cloudy and clear skies. Windy at times.
Monday, December 22nd, 2025
Overnight Temperature: -11°C
Cloudy. Windy at times.
Morning Temperature: -7°C
Cloudy. Windy at times.
Afternoon Temperature: -2°C
Cloudy with a chance of flurries. Windy at times.
Evening Temperature: 1°C
Cloudy. Windy.





 

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This WeatherCity Weather Forecast for Thunder Bay, Ontario, Canada is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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