Thunder Bay Water Temperature

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Thunder Bay is a city close to Lake Superior. August is the month with the hottest water temperature at 61.5°F / 16.4°C. The coldest month is March with an ø water temperature of 31.8°F / -0.1°C. May is the month with the lowest precipitation of 0.2in / 6.3mm and December with the highest precipitation in a year with 1.7in / 43.9mm. The avg. air temperature is around 66°F / 18.9°C, July is the month with the highest temperature. January is the coolest with 8.2°F / -13.2°C average air temperature. June, July, August, September would be the best time to visit. Warm-summer humid continental climate would be the climate here.

Thunder Bay Summary

Description	Value
Current water temperature	/
Warmest Month Water Temperature:	August with 16.4°C / 61.5°F
Coldest Month Water Temperature:	March with -0.1°C / 31.8°F
Warmest Month Air Temperature:	July with 18.9°C / 66°F
Coldest Month Air Temperature:	January with -13.2°C / 8.2°F
Wettest Month:	December with 43.9mm / 1.7in
Driest Month:	May with 6.3mm / 0.2in
Highest Humidity	December with 77.3%
Lowest Humidity	May with 70.2%
Best Time to Visit:	June, July, August, September
Climate Classification	Warm-summer humid continental climate

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Thunder Bay water temperature by month

°C

Lake Superior water temperature by month

	Max. Water Temperature (°C)	ø. Water Temperature (°C)	Min. Water Temperature (°C)
January	1.8	1	0.5
February	0.4	0.1	-0.1
March	0.2	-0	-0.2
April	1.4	0.8	0.4
May	3.2	1.9	1.1
June	7	4.6	3
July	15.2	10.8	6.9
August	16.9	16	14.8
September	16.7	14.8	12.6
October	12.8	10.3	7.9
November	7.8	6.3	5
December	4.9	3.8	2.9

°F

Lake Superior water temperature by month

	Max. Water Temperature (°F)	ø. Water Temperature (°F)	Min. Water Temperature (°F)
January	35.2	33.8	32.9
February	32.7	32.2	31.8
March	32.4	32	31.6
April	34.5	33.4	32.7
May	37.8	35.4	34
June	44.6	40.3	37.4
July	59.4	51.4	44.4
August	62.4	60.8	58.6
September	62.1	58.6	54.7
October	55	50.5	46.2
November	46	43.3	41
December	40.8	38.8	37.2

The hottest water temperature typically reached in August with around 61.5°F / 16.4°C. The coldest in March with an average water temperature of 31.8°F / -0.1°C.

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Thunder Bay weather today & 14-day weather forecast

7-day weather forecast
+9-day forecast

7-day weather forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Nov. 14	Overcast clouds	47 °F 31°F	9 °C -1°C	2mph (4km/h) east-southeast	0in (0mm) 0 %	82%
Nov. 15	Light shower rain	47 °F 30°F	8 °C -1°C	3mph (5km/h) west	0in (2mm) 45 %	74%
Nov. 16	Broken clouds	38 °F 26°F	3 °C -4°C	3mph (6km/h) northwest	0in (0mm) 0 %	59%
Nov. 17	Few clouds	37 °F 21°F	3 °C -6°C	2mph (3km/h) northwest	0in (0mm) 0 %	65%
Nov. 18	Scattered clouds	37 °F 19°F	3 °C -8°C	2mph (3km/h) northwest	0in (0mm) 0 %	71%
Nov. 19	Overcast clouds	41 °F 24°F	5 °C -5°C	2mph (3km/h) west-southwest	0in (0mm) 0 %	77%
Nov. 20	Overcast clouds	38 °F 33°F	3 °C 1°C	2mph (3km/h) west	0in (0mm) 0 %	88%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Nov. 21	Broken clouds	35 °F 32°F	2 °C 0°C	2mph (4km/h) west-southwest	0in (0mm) 0 %	85%
Nov. 22	Broken clouds	36 °F 32°F	2 °C 0°C	2mph (4km/h) west	0in (0mm) 0 %	82%
Nov. 23	Overcast clouds	37 °F 33°F	3 °C 1°C	2mph (4km/h) west	0in (0mm) 0 %	83%
Nov. 24	Mix snow/rain	36 °F 33°F	2 °C 0°C	2mph (4km/h) west-southwest	0in (1mm) 50 %	85%
Nov. 25	Broken clouds	32 °F 31°F	-0 °C -1°C	3mph (4km/h) north-northeast	0in (0mm) 15 %	77%
Nov. 26	Snow	27 °F 27°F	-3 °C -3°C	3mph (4km/h) north-northeast	0in (4mm) 95 %	81%
Nov. 27	Flurries	26 °F 26°F	-3 °C -4°C	2mph (3km/h) west-northwest	0in (1mm) 60 %	73%
Nov. 28	Snow	26 °F 24°F	-3 °C -4°C	3mph (5km/h) north-northeast	0in (5mm) 95 %	83%
Nov. 29	Flurries	20 °F 16°F	-7 °C -9°C	5mph (8km/h) northwest	0in (6mm) 85 %	71%

Thunder Bay weather by month / climate table

°C

	Max. Temperature °C	ø. Temperature °C	Min. Temperature (°C)	Precip. (mm)	Rainy Days (d)	Rel. Humidity (%)
January	-6.3	-13.2	-20.1	29	0	75.3%
February	-5.9	-12.2	-18	14.8	0	73.8%
March	2.5	-5.6	-14.9	6.9	0	73.8%
April	8.4	1	-6	7.9	0	71.1%
May	17.5	8	1.1	6.3	1	70.2%
June	21.3	13.9	6.7	16.5	1	74.6%
July	24.1	18.9	13.2	28	1	72.6%
August	23.7	18.8	14.6	26.8	0	73%
September	22	14.9	7.1	23.3	1	74.2%
October	14.3	7.3	1.7	24.9	0	74.9%
November	6.6	0.4	-6.8	26.4	0	74.8%
December	-2.3	-8.1	-13.4	43.9	0	77.3%

°F

	Max. Temperature °F	ø. Temperature °F	Min. Temperature (°F)	Precip. (in)	Rainy Days (d)	Rel. Humidity (%)
January	20.7	8.2	-4.2	1.1	0	75.3%
February	21.4	10	-0.4	0.6	0	73.8%
March	36.5	21.9	5.2	0.3	0	73.8%
April	47.1	33.8	21.2	0.3	0	71.1%
May	63.5	46.4	34	0.2	1	70.2%
June	70.3	57	44.1	0.6	1	74.6%
July	75.4	66	55.8	1.1	1	72.6%
August	74.7	65.8	58.3	1.1	0	73%
September	71.6	58.8	44.8	0.9	1	74.2%
October	57.7	45.1	35.1	1	0	74.9%
November	43.9	32.7	19.8	1	0	74.8%
December	27.9	17.4	7.9	1.7	0	77.3%

May is the month with the lowest rain of 0.2in / 6.3mm and December with the highest precipitation in a year with 1.7in / 43.9mm. The avg. temperature is around 66°F / 18.9°C, July is the month with the highest temperature. January is the coolest with 8.2°F / -13.2°C average temperature.

Activities & POI in Thunder Bay

Type of Activity	List
Beach	Attwood Beach, Carnelian Beach, Thomsonite Beach, Greenstone Beach, Little Greenstone Beach, Sand Trap
Attraction	Kakabeka Falls, Time Zone, The First Railroad Spike, David Thompson Astronomical Obervatory, Fort William Historical Park
Caravan Site	Thunder Bay KOA Holiday, Happy Land Park, Scott and Rohnda's Resort & Campgrounds

Lake Superior