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Thunder Bay, On Climate & Temperature

  • Thunder Bay, On, Canada is at 4822'N, 8918'W, 199 m (654 ft). See map.
  • Thunder Bay, On has a humid continental climate with severe winters, no dry season, warm summers and strong seasonality (Kppen-Geiger classification: Dfb).
  • According to the Holdridge life zones system of bioclimatic classification Thunder Bay, On is situated in or near the cool temperate moist forest biome.
  • The annual mean temperature is 2.4 degrees Celsius (36.3 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.
  • Average monthly temperatures vary by 32.7 °C (58.9°F). This indicates that the continentality type is continental, subtype truly continental. Thunder Bay, On Climate Graph
  • In the winter time records indicate temperatures by day reach -7°C (19.3°F) on average falling to -19.2°C (-2.5°F) overnight.
  • In spring time temperatures climb reaching 8.2°C (46.8°F) generally in the afternoon with overnight lows of -4.2°C (24.4°F).
  • During summer average high temperatures are 22.6°C (72.7°F) and average low temperatures are 9.4°C (48.9°F).
  • Come autumn/ fall temperatures decrease achieving average highs of 10°C (50.1°F) during the day and lows of -0.8°C (30.6°F) generally shortly after sunrise.
  • Total annual Precipitation averages 703.7 mm (27.7 inches) which is equivalent to 703.7 Litres/m (17.26 Gallons/ft).
  • Were you to burrow down through the centre of the Earth from Thunder Bay, On you would pop up nearest to the climate station at Port-Aux-Francais, kerguelen islands, French Southern Lands where you would find a Tundra climate (Boreal rain forest biome).

Thunder Bay, On Climate Table

  Climate Variable Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
 
Average Max Temperature °C ( °F) -9 (16) -6 (21) 0 (32) 9 (48) 16 (60) 21 (69) 24 (76) 23 (73) 17 (63) 11 (51) 2 (36) -6 (21) 9 (47)
 
Average Temperature °C ( °F) -15 (5) -13 (9) -6 (22) 3 (37) 9 (48) 14 (57) 18 (64) 16 (62) 11 (52) 5 (42) -3 (27) -11 (12) 2 (36)
 
Average Min Temperature °C ( °F) -21 (-6) -20 (-3) -12 (11) -3 (26) 2 (36) 7 (45) 11 (52) 10 (50) 5 (41) 0 (32) -7 (19) -17 (2) -4 (25)
 
Average Precipitation mm (in) 32 (1) 26 (1) 41 (2) 47 (2) 69 (3) 84 (3) 80 (3) 89 (3) 86 (3) 61 (2) 49 (2) 39 (2) 704 (28)
Average Daylight Hours/ Day 8h 48' 10h 07' 11h 49' 13h 38' 15h 12' 16h 01' 15h 39' 14h 17' 12h 32' 10h 43' 9h 10' 8h 23' 12h 00'
Sun altitude at solar noon on the 21st day (). 21.8 31.2 42 53.7 61.9 65.1 62 53.6 42.2 30.7 21.6 18.2 42

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