Thunder Bay, Ontario, Canada Climate

Weather: 13.94°C/57.09°F, Wind SW at 3.91 km/h, 52% Humidity, 0% Chance of rain

Canada
(Photo by Hannele Kormano on Unsplash)
Contents

Thunder Bay Climate Summary

Located at an elevation of 186.6 meters (612.2 feet) above sea level, Thunder Bay has a Humid continental, no dry season, warm summer climate (Classification: Dfb). The district’s yearly temperature is 3.23ºC (37.81ºF) and it is 1.14% higher than Canada’s averages. Thunder Bay typically receives about 21.33 millimeters (0.84 inches) of precipitation and has 33.0 rainy days (9.04% of the time) annually.

Country Canada
City Ontario
Longitude -89.2476823
Latitude 48.3808951
Attitude/Elevation 186.6m (612.2ft)
Local time Friday 15:48
Annual high temperature 5.87ºC (42.57ºF)
Annual low temperature -1.08ºC (30.06ºF)
Average annual precip. 21.33mm (0.84in)
Warmest month July (21.94ºC / 71.49ºF)
Coldest Month February (-17.2ºC / 1.04ºF)
Wettest Month September (30.1mm / 1.19in)
Driest Month March (14.02mm / 0.55in)
Number of days with rainfall (≥ 1.0 mm) 33.0 days (9.04%)
Days with no rain 332.0 days (90.96%)
Humidity 77.94%

Climate Thunder Bay: Weather By Month

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
Record high °C (°F) 2.0(35.6) 1.0(33.8) 8.0(46.4) 17.0(62.6) 23.0(73.4) 25.0(77.0) 29.0(84.2) 28.0(82.4) 24.0(75.2) 17.0(62.6) 12.0(53.6) 3.0(37.4) 29.0(84.2)
Average high °C (°F) -9.25(15.35) -9.05(15.71) -1.74(28.87) 3.72(38.7) 12.55(54.59) 17.43(63.37) 21.94(71.49) 20.69(69.24) 15.11(59.2) 5.74(42.33) -1.29(29.68) -5.41(22.26) 5.87(42.57)
Daily mean °C (°F) -12.23(9.99) -12.51(9.48) -4.41(24.06) 1.33(34.39) 9.68(49.42) 14.57(58.23) 18.81(65.86) 17.72(63.9) 12.36(54.25) 3.81(38.86) -2.93(26.73) -7.44(18.61) 3.23(37.81)
Average low °C (°F) -16.81(1.74) -17.2(1.04) -8.63(16.47) -2.6(27.32) 4.46(40.03) 9.01(48.22) 13.24(55.83) 12.89(55.2) 8.6(47.48) 1.02(33.84) -6.14(20.95) -10.83(12.51) -1.08(30.06)
Record low °C (°F) -32.0(-25.6) -32.0(-25.6) -23.0(-9.4) -12.0(10.4) -6.0(21.2) 1.0(33.8) 9.0(48.2) 7.0(44.6) -2.0(28.4) -7.0(19.4) -17.0(1.4) -24.0(-11.2) -32.0(-25.6)
Average precipitation mm (inches) 14.28(0.56) 15.84(0.62) 14.02(0.55) 19.48(0.77) 19.21(0.76) 21.96(0.86) 29.73(1.17) 24.72(0.97) 30.1(1.19) 25.79(1.02) 19.05(0.75) 21.76(0.86) 21.33(0.84)
Average precipitation days (≥ 1.0 mm) 2.64 2.27 1.82 2.91 2.55 2.82 3.27 3.45 3.36 3.09 2.64 2.18 2.75
Average relative humidity (%) 85.85 85.22 81.17 74.9 67.54 71.46 73.38 76.97 79.38 77.75 78.81 82.83 77.94
Mean monthly sunshine hours 5.27 6.7 8.72 9.81 13.09 15.42 13.75 12.45 9.77 8.21 6.22 5.82 9.6

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Thunder Bay in recent years.

Thunder Bay

Thunder Bay Temperature by Month

July
18.81°C | 65.86°F
August
17.72°C | 63.9°F
June
14.57°C | 58.23°F
September
12.36°C | 54.25°F
May
9.68°C | 49.42°F
October
3.81°C | 38.86°F
April
1.33°C | 34.39°F
November
-2.93°C | 26.73°F
March
-4.41°C | 24.06°F
December
-7.44°C | 18.61°F
January
-12.23°C | 9.99°F
February
-12.51°C | 9.48°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
Temperature Max Average Min
Max Temperature 20.72°C (69.3°F) 14.41°C (57.94°F) 8.88°C (47.98°F)
Avg Temperature 16.78°C (62.2°F) 11.45°C (52.61°F) 5.92°C (42.66°F)
Min Temperature 13.82°C (56.88°F) 7.4°C (45.32°F) 0.99°C (33.78°F)
Dew Point Max Average Min
Dew Point 11.84°C (53.31°F) 6.05°C (42.89°F) -5.92°C (21.34°F)
Precipitation Max Average Min Sum
Precipitation 16.48mm | 0.65in 1.55mm | 0.06in 0.0mm | 0in 46.38mm | 1.83in
Snowdepth 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in
Wind Max Average Min
Wind 24.67kmh | 15.33mph 12.76kmh | 7.93mph 4.93kmh | 3.06mph
Gust Wind 35.53kmh | 22.08mph 20.0kmh | 12.43mph 8.88kmh | 5.52mph
Sea Level Pressure Max Average Min
Sea Level Pressure 16.48mb 1.55mb 0.0mb
Thunder Bay

Daily Observations

Time Temperature Dew Point Humidity Wind Speed Pressure Precipitation
September ° C | ° F ° C | ° F % Kph | Mph Hg | Mb Total (mm/in)
2020-09-01 14.8 | 58.64 6.91 | 44.44 62 14.8 | 9.2 29.35 | 993.81 0.0 | 0
2020-09-02 15.79 | 60.42 9.87 | 49.77 72 18.75 | 11.65 29.17 | 987.89 1.09 | 0.04
2020-09-03 12.83 | 55.09 8.88 | 47.98 77 23.69 | 14.72 29.06 | 983.94 16.48 | 0.65
2020-09-04 10.86 | 51.55 4.93 | 40.87 72 17.76 | 11.04 29.46 | 997.76 0.3 | 0.01
2020-09-05 12.83 | 55.09 4.93 | 40.87 67 12.83 | 7.97 29.67 | 1004.66 0.0 | 0
2020-09-06 13.82 | 56.88 9.87 | 49.77 80 11.84 | 7.36 29.38 | 994.8 6.12 | 0.24
2020-09-07 8.88 | 47.98 1.97 | 35.55 60 24.67 | 15.33 29.41 | 995.78 0.0 | 0
2020-09-08 5.92 | 42.66 0.0 | 0 69 8.88 | 5.52 29.87 | 1011.57 0.0 | 0
2020-09-09 7.9 | 46.22 0.99 | 33.78 70 9.87 | 6.13 30.02 | 1016.51 0.0 | 0
2020-09-10 11.84 | 53.31 3.95 | 39.11 69 10.86 | 6.75 29.99 | 1015.52 0.0 | 0
2020-09-11 12.83 | 55.09 5.92 | 42.66 69 8.88 | 5.52 29.81 | 1009.6 0.0 | 0
2020-09-12 10.86 | 51.55 7.9 | 46.22 81 7.9 | 4.91 29.58 | 1001.7 0.0 | 0
2020-09-13 11.84 | 53.31 6.91 | 44.44 76 13.82 | 8.59 29.55 | 1000.72 0.0 | 0
2020-09-14 7.9 | 46.22 1.97 | 35.55 69 9.87 | 6.13 29.93 | 1013.55 0.0 | 0
2020-09-15 14.8 | 58.64 10.86 | 51.55 86 5.92 | 3.68 29.46 | 997.76 0.79 | 0.03
2020-09-16 9.87 | 49.77 2.96 | 37.33 66 15.79 | 9.81 29.55 | 1000.72 0.0 | 0
2020-09-17 5.92 | 42.66 -5.92 | 21.34 45 9.87 | 6.13 29.9 | 1012.56 0.0 | 0
2020-09-18 6.91 | 44.44 -3.95 | 24.89 53 9.87 | 6.13 29.99 | 1015.52 0.0 | 0
2020-09-19 6.91 | 44.44 3.95 | 39.11 83 8.88 | 5.52 29.87 | 1011.57 8.09 | 0.32
2020-09-20 12.83 | 55.09 7.9 | 46.22 80 12.83 | 7.97 29.76 | 1007.62 0.0 | 0
2020-09-21 15.79 | 60.42 11.84 | 53.31 80 17.76 | 11.04 29.58 | 1001.7 0.69 | 0.03
2020-09-22 16.78 | 62.2 11.84 | 53.31 76 9.87 | 6.13 29.58 | 1001.7 0.0 | 0
2020-09-23 16.78 | 62.2 9.87 | 49.77 70 4.93 | 3.06 29.49 | 998.74 0.0 | 0
2020-09-24 10.86 | 51.55 7.9 | 46.22 81 13.82 | 8.59 29.52 | 999.73 0.0 | 0
2020-09-25 12.83 | 55.09 10.86 | 51.55 94 6.91 | 4.29 29.35 | 993.81 1.58 | 0.06
2020-09-26 13.82 | 56.88 10.86 | 51.55 87 7.9 | 4.91 29.17 | 987.89 7.2 | 0.28
2020-09-27 12.83 | 55.09 9.87 | 49.77 78 16.78 | 10.43 29.03 | 982.95 2.17 | 0.09
2020-09-28 10.86 | 51.55 6.91 | 44.44 79 13.82 | 8.59 29.35 | 993.81 0.59 | 0.02
2020-09-29 8.88 | 47.98 6.91 | 44.44 88 14.8 | 9.2 29.29 | 991.83 1.18 | 0.05
2020-09-30 7.9 | 46.22 3.95 | 39.11 82 18.75 | 11.65 29.2 | 988.87 0.1 | 0.0

Thunder Bay 3 Year Historical Weather Data

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