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Climate & Weather Averages in Thunder Bay, Ontario, Canada

Currently: 46 °F. Passing clouds. (Weather station: Thunder Bay, Canada). See more current weather

Annual Weather Averages Near Thunder Bay

Averages are for Thunder Bay, which is 4 miles from Thunder Bay.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Thunder Bay

High Temp: 77 °F

Low Temp: -2 °F

Mean Temp: 38 °F

Precipitation: 1.96"

Humidity: 74%

Dew Point: 30 °F

Wind: 13 mph

Pressure: 30.01 "Hg

Visibility: 14 mi

January Climate & Weather Averages in Thunder Bay

High Temp: 19 °F

Low Temp: -2 °F

Mean Temp: 8 °F

Precipitation: 0.85"

Humidity: 74%

Dew Point: 2 °F

Wind: 13 mph

Pressure: 30.07 "Hg

Visibility: 13 mi

February Climate & Weather Averages in Thunder Bay

High Temp: 23 °F

Low Temp: -1 °F

Mean Temp: 11 °F

Precipitation: 0.55"

Humidity: 70%

Dew Point: 4 °F

Wind: 13 mph

Pressure: 30.09 "Hg

Visibility: 14 mi

March Climate & Weather Averages in Thunder Bay

High Temp: 34 °F

Low Temp: 12 °F

Mean Temp: 23 °F

Precipitation: 0.85"

Humidity: 70%

Dew Point: 15 °F

Wind: 13 mph

Pressure: 30.09 "Hg

Visibility: 14 mi

April Climate & Weather Averages in Thunder Bay

High Temp: 48 °F

Low Temp: 25 °F

Mean Temp: 36 °F

Precipitation: 1.87"

Humidity: 66%

Dew Point: 25 °F

Wind: 14 mph

Pressure: 30.02 "Hg

Visibility: 15 mi

May Climate & Weather Averages in Thunder Bay

High Temp: 61 °F

Low Temp: 36 °F

Mean Temp: 48 °F

Precipitation: 2.78"

Humidity: 67%

Dew Point: 37 °F

Wind: 14 mph

Pressure: 29.98 "Hg

Visibility: 15 mi

June Climate & Weather Averages in Thunder Bay

High Temp: 71 °F

Low Temp: 46 °F

Mean Temp: 59 °F

Precipitation: 2.93"

Humidity: 74%

Dew Point: 49 °F

Wind: 13 mph

Pressure: 29.92 "Hg

Visibility: 15 mi

July Climate & Weather Averages in Thunder Bay

High Temp: 77 °F

Low Temp: 52 °F

Mean Temp: 64 °F

Precipitation: 3.19"

Humidity: 76%

Dew Point: 56 °F

Wind: 12 mph

Pressure: 29.93 "Hg

Visibility: 15 mi

August Climate & Weather Averages in Thunder Bay

High Temp: 75 °F

Low Temp: 51 °F

Mean Temp: 63 °F

Precipitation: 2.61"

Humidity: 78%

Dew Point: 55 °F

Wind: 11 mph

Pressure: 29.97 "Hg

Visibility: 15 mi

September Climate & Weather Averages in Thunder Bay

High Temp: 66 °F

Low Temp: 43 °F

Mean Temp: 55 °F

Precipitation: 2.45"

Humidity: 81%

Dew Point: 48 °F

Wind: 12 mph

Pressure: 29.98 "Hg

Visibility: 14 mi

October Climate & Weather Averages in Thunder Bay

High Temp: 52 °F

Low Temp: 32 °F

Mean Temp: 42 °F

Precipitation: 2.65"

Humidity: 79%

Dew Point: 35 °F

Wind: 13 mph

Pressure: 29.98 "Hg

Visibility: 14 mi

November Climate & Weather Averages in Thunder Bay

High Temp: 37 °F

Low Temp: 20 °F

Mean Temp: 29 °F

Precipitation: 1.67"

Humidity: 78%

Dew Point: 23 °F

Wind: 13 mph

Pressure: 30.01 "Hg

Visibility: 13 mi

December Climate & Weather Averages in Thunder Bay

High Temp: 25 °F

Low Temp: 6 °F

Mean Temp: 16 °F

Precipitation: 1.08"

Humidity: 79%

Dew Point: 11 °F

Wind: 13 mph

Pressure: 30.04 "Hg

Visibility: 13 mi

Quick Climate Info

Hottest MonthJuly (64 °F avg)
Coldest MonthJanuary (8 °F avg)
Wettest MonthJuly (3.19" avg)
Windiest MonthMay (14 mph avg)
Annual precip.23.48" (per year)

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