Thunder Bay Weather History Ontario, Canada

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Past date: Past date must be from 1st Jan, 2009 onwards.

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Daily and hourly data from 1 Jan 2009 onwards.
Yearly Monthly Averages
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Fri 04 Sep, 2026 Weather in Thunder Bay

Sunrise: 07:18 AM Sunset: 08:33 PM	Moonrise: 11:43 PM Moonset: 04:14 PM	Max: 18.5 °c	Min: 15.5 °c	Avg: 16.7 °c	Precip: 22.63 mm	Max Wind: 22.0 kph

	Fri 04 0:00 am	Fri 04 3:00 am	Fri 04 6:00 am	Fri 04 9:00 am	Fri 04 12:00 pm	Fri 04 3:00 pm	Fri 04 6:00 pm	Fri 04 9:00 pm
Icon
Temp	16.1°c	16.4°c	15.5°c	16.7°c	16.8°c	16.8°c	17.3°c	16.7°c
Wind	9.7 kmph	11.9 kmph	14.8 kmph	17.3 kmph	18.4 kmph	16.2 kmph	12.2 kmph	9.0 kmph
Precip	0.00 mm	1.29 mm	0.00 mm	0.00 mm	0.00 mm	0.98 mm	1.81 mm	1.85 mm
Cloud	93%	100%	87%	47%	100%	94%	100%	100%
Humidity	81%	90%	87%	92%	94%	92%	87%	88%
Pressure	1014 mb	1013 mb	1015 mb	1016 mb	1016 mb	1017 mb	1017 mb	1017 mb

Thunder Bay Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	-9°C / 17°F	-16°C / 4°F	-12°C / 10°F	81 hours	32.20 mm / 1.27 In	7 days	1018 mb / 31 In
February	-8°C / 18°F	-15°C / 5°F	-11°C / 12°F	78 hours	37.45 mm / 1.47 In	7 days	1019 mb / 31 In
March	-1°C / 30°F	-8°C / 18°F	-5°C / 24°F	94 hours	62.07 mm / 2.44 In	6 days	1018 mb / 31 In
April	4°C / 40°F	-2°C / 29°F	1°C / 34°F	118 hours	103.15 mm / 4.06 In	8 days	1016 mb / 30 In
May	12°C / 54°F	4°C / 40°F	8°C / 47°F	172 hours	84.16 mm / 3.31 In	6 days	1015 mb / 30 In
June	18°C / 64°F	9°C / 49°F	13°C / 56°F	176 hours	94.08 mm / 3.70 In	7 days	1012 mb / 30 In
July	22°C / 71°F	14°C / 57°F	18°C / 64°F	203 hours	98.24 mm / 3.87 In	7 days	1013 mb / 30 In
August	22°C / 71°F	14°C / 57°F	17°C / 63°F	211 hours	97.22 mm / 3.83 In	6 days	1013 mb / 30 In
September	17°C / 63°F	10°C / 50°F	14°C / 56°F	188 hours	98.79 mm / 3.89 In	6 days	1015 mb / 30 In
October	9°C / 49°F	4°C / 39°F	7°C / 44°F	137 hours	73.13 mm / 2.88 In	7 days	1014 mb / 30 In
November	2°C / 36°F	-3°C / 27°F	0°C / 31°F	114 hours	59.18 mm / 2.33 In	7 days	1016 mb / 30 In
December	-5°C / 24°F	-11°C / 13°F	-8°C / 18°F	87 hours	57.38 mm / 2.26 In	9 days	1017 mb / 31 In

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