Thunder Bay, Ontario, Canada Climate

Weather: 4.04°C/39.27°F, Wind SW at 5.66 km/h, 100% Humidity, 1.26% 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.

CountryCanada
CityOntario
Longitude-89.2476823
Latitude48.3808951
Attitude/Elevation186.6m (612.2ft)
Local timeSaturday 15:22
Annual high temperature5.87ºC (42.57ºF)
Annual low temperature-1.08ºC (30.06ºF)
Average annual precip.21.33mm (0.84in)
Warmest monthJuly (21.94ºC / 71.49ºF)
Coldest MonthFebruary (-17.2ºC / 1.04ºF)
Wettest MonthSeptember (30.1mm / 1.19in)
Driest MonthMarch (14.02mm / 0.55in)
Number of days with rainfall (≥ 1.0 mm)33.0 days (9.04%)
Days with no rain332.0 days (90.96%)
Humidity77.94%

Climate Thunder Bay: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
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)2.642.271.822.912.552.823.273.453.363.092.642.182.75
Average relative humidity (%)85.8585.2281.1774.967.5471.4673.3876.9779.3877.7578.8182.8377.94
Mean monthly sunshine hours5.276.78.729.8113.0915.4213.7512.459.778.216.225.829.6

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
TemperatureMaxAverageMin
Max Temperature20.72°C (69.3°F)14.41°C (57.94°F)8.88°C (47.98°F)
Avg Temperature16.78°C (62.2°F)11.45°C (52.61°F)5.92°C (42.66°F)
Min Temperature13.82°C (56.88°F)7.4°C (45.32°F)0.99°C (33.78°F)
Dew PointMaxAverageMin
Dew Point11.84°C (53.31°F)6.05°C (42.89°F)-5.92°C (21.34°F)
PrecipitationMaxAverageMinSum
Precipitation16.48mm | 0.65in1.55mm | 0.06in0.0mm | 0in46.38mm | 1.83in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind24.67kmh | 15.33mph12.76kmh | 7.93mph4.93kmh | 3.06mph
Gust Wind35.53kmh | 22.08mph20.0kmh | 12.43mph8.88kmh | 5.52mph
Sea Level PressureMaxAverageMin
Sea Level Pressure16.48mb1.55mb0.0mb
Thunder Bay

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2020-09-0114.8 | 58.646.91 | 44.446214.8 | 9.229.35 | 993.810.0 | 0
2020-09-0215.79 | 60.429.87 | 49.777218.75 | 11.6529.17 | 987.891.09 | 0.04
2020-09-0312.83 | 55.098.88 | 47.987723.69 | 14.7229.06 | 983.9416.48 | 0.65
2020-09-0410.86 | 51.554.93 | 40.877217.76 | 11.0429.46 | 997.760.3 | 0.01
2020-09-0512.83 | 55.094.93 | 40.876712.83 | 7.9729.67 | 1004.660.0 | 0
2020-09-0613.82 | 56.889.87 | 49.778011.84 | 7.3629.38 | 994.86.12 | 0.24
2020-09-078.88 | 47.981.97 | 35.556024.67 | 15.3329.41 | 995.780.0 | 0
2020-09-085.92 | 42.660.0 | 0698.88 | 5.5229.87 | 1011.570.0 | 0
2020-09-097.9 | 46.220.99 | 33.78709.87 | 6.1330.02 | 1016.510.0 | 0
2020-09-1011.84 | 53.313.95 | 39.116910.86 | 6.7529.99 | 1015.520.0 | 0
2020-09-1112.83 | 55.095.92 | 42.66698.88 | 5.5229.81 | 1009.60.0 | 0
2020-09-1210.86 | 51.557.9 | 46.22817.9 | 4.9129.58 | 1001.70.0 | 0
2020-09-1311.84 | 53.316.91 | 44.447613.82 | 8.5929.55 | 1000.720.0 | 0
2020-09-147.9 | 46.221.97 | 35.55699.87 | 6.1329.93 | 1013.550.0 | 0
2020-09-1514.8 | 58.6410.86 | 51.55865.92 | 3.6829.46 | 997.760.79 | 0.03
2020-09-169.87 | 49.772.96 | 37.336615.79 | 9.8129.55 | 1000.720.0 | 0
2020-09-175.92 | 42.66-5.92 | 21.34459.87 | 6.1329.9 | 1012.560.0 | 0
2020-09-186.91 | 44.44-3.95 | 24.89539.87 | 6.1329.99 | 1015.520.0 | 0
2020-09-196.91 | 44.443.95 | 39.11838.88 | 5.5229.87 | 1011.578.09 | 0.32
2020-09-2012.83 | 55.097.9 | 46.228012.83 | 7.9729.76 | 1007.620.0 | 0
2020-09-2115.79 | 60.4211.84 | 53.318017.76 | 11.0429.58 | 1001.70.69 | 0.03
2020-09-2216.78 | 62.211.84 | 53.31769.87 | 6.1329.58 | 1001.70.0 | 0
2020-09-2316.78 | 62.29.87 | 49.77704.93 | 3.0629.49 | 998.740.0 | 0
2020-09-2410.86 | 51.557.9 | 46.228113.82 | 8.5929.52 | 999.730.0 | 0
2020-09-2512.83 | 55.0910.86 | 51.55946.91 | 4.2929.35 | 993.811.58 | 0.06
2020-09-2613.82 | 56.8810.86 | 51.55877.9 | 4.9129.17 | 987.897.2 | 0.28
2020-09-2712.83 | 55.099.87 | 49.777816.78 | 10.4329.03 | 982.952.17 | 0.09
2020-09-2810.86 | 51.556.91 | 44.447913.82 | 8.5929.35 | 993.810.59 | 0.02
2020-09-298.88 | 47.986.91 | 44.448814.8 | 9.229.29 | 991.831.18 | 0.05
2020-09-307.9 | 46.223.95 | 39.118218.75 | 11.6529.2 | 988.870.1 | 0.0

Thunder Bay 3 Year Historical Weather Data

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