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May 20th, 2026 :: 2:42 am EDT   

Local Weather Report for
Thunder Bay
Ontario, Canada

 Current Thunder Bay Weather Conditions Updated May 20th at 2:00 am 
Temperature:1°C Dew Point:-2°C
Barometer:102.2 kPa Wind:N 14 Km/h
Humidity:80.3% Visibility:0 Km
 
 Thunder Bay Weather Forecast Summary  
 
Today
May 20th
Thursday
May 21st
Friday
May 22nd
Saturday
May 23rd
Sunday
May 24th
Sunny Mostly Sunny Mostly Sunny Showers Mostly Cloudy with Showers
8°C
7°C
2°C
10°C
3°C
7°C
4°C
10°C
5°C
 
 Thunder Bay Detailed Weather Forecast  
 
Wednesday, May 20th, 2026
Overnight Temperature: 0°C
Mostly clear.
Morning Temperature: 3°C
Sunny.
Afternoon Temperature: 6°C
Sunny with cloudy periods. Windy at times.
Evening Temperature: 3°C
Clear.
Thursday, May 21st, 2026
Overnight Temperature: 2°C
Clear.
Morning Temperature: 5°C
Sunny.
Afternoon Temperature: 7°C
Sunny.
Evening Temperature: 5°C
Mostly clear.
Friday, May 22nd, 2026
Overnight Temperature: 4°C
Mostly clear.
Morning Temperature: 7°C
Sunny.
Afternoon Temperature: 10°C
Mostly sunny. Windy at times.
Evening Temperature: 6°C
Clear with cloudy periods.
Saturday, May 23rd, 2026
Overnight Temperature: 4°C
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 6°C
Mostly cloudy.
Afternoon Temperature: 6°C
Mostly cloudy with showers likely.
Evening Temperature: 6°C
Cloudy with a few showers. Windy at times.
Sunday, May 24th, 2026
Overnight Temperature: 5°C
Cloudy with clear periods with showers likely.
Morning Temperature: 7°C
Cloudy with sunny periods.
Afternoon Temperature: 9°C
A mix of cloud and sun.
Evening Temperature: 5°C
A mix of cloudy and clear skies.
Monday, May 25th, 2026
Overnight Temperature: 5°C
A mix of clear and cloudy skies.
Morning Temperature: 8°C
A mix of cloud and sun.
Afternoon Temperature: 12°C
A mix of sun and cloud.
Evening Temperature: 9°C
Clear with cloudy periods.
Tuesday, May 26th, 2026
Overnight Temperature: 7°C
Cloudy with clear periods.
Morning Temperature: 9°C
A mix of cloud and sun.
Afternoon Temperature: 13°C
Sunny with cloudy periods.
Evening Temperature: 11°C
Clear.
Wednesday, May 27th, 2026
Overnight Temperature: 9°C
Clear with cloudy periods.
Morning Temperature: 9°C
A mix of cloud and sun.
Afternoon Temperature: 13°C
A mix of sun and cloud.
Evening Temperature: 12°C
A mix of clear and cloudy skies.





 

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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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