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Thunder Bay January Weather

Averages and records for weather in Thunder Bay, Ontario in the month of January.

Typical Thunder Bay January Weather 1991–2020
Average daily high	-7.8 °C
Average daily low	-19.0 °C
Average monthly precipitation	2.5 cm
Daily chance of precipitation	40.7%

Thunder Bay January Weather Records 1941–2024
Highest temperature	9.4 °C	January 27, 2006
Lowest temperature	-43.2 °C	January 31, 1996
Highest daily low	1.1 °C	January 11, 2013
Lowest daily high	-29.5 °C	January 9, 1982
Hottest average high temperature	-1.7 °C	1944
Coldest average high temperature	-15.7 °C	1994
Most daily precipitation	5.2 cm	January 20, 1956
Most monthly precipitation	14.3 cm	1956

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
January 1	-6.7	-17.4	3.3	-37.5
January 2	-6.8	-17.6	3.3	-39.0
January 3	-6.8	-17.7	6.0	-35.7
January 4	-7.0	-17.9	4.1	-33.3
January 5	-7.3	-18.2	3.4	-34.5
January 6	-7.4	-18.5	4.7	-34.6
January 7	-7.5	-18.7	7.6	-37.2
January 8	-7.5	-18.8	7.1	-38.3
January 9	-7.6	-18.9	4.9	-37.9
January 10	-7.6	-18.9	7.1	-36.7
January 11	-7.8	-19.1	6.6	-36.5
January 12	-7.8	-19.1	6.3	-36.5
January 13	-7.8	-19.1	4.4	-34.4
January 14	-7.8	-19.3	3.5	-37.8
January 15	-7.8	-19.4	3.3	-37.2
January 16	-7.8	-19.5	5.0	-39.0
January 17	-7.8	-19.5	3.3	-40.4
January 18	-7.8	-19.5	4.5	-38.3
January 19	-7.8	-19.5	5.0	-38.3
January 20	-7.7	-19.5	3.9	-35.6
January 21	-7.6	-19.5	3.3	-37.5
January 22	-7.6	-19.6	7.2	-39.5
January 23	-7.6	-19.6	8.3	-37.6
January 24	-7.6	-19.6	6.1	-37.2
January 25	-7.6	-19.7	7.8	-38.3
January 26	-7.6	-19.7	6.1	-37.3
January 27	-7.5	-19.8	9.4	-38.9
January 28	-7.5	-19.8	4.0	-37.2
January 29	-7.4	-19.8	2.3	-40.0
January 30	-7.4	-19.9	4.5	-41.1
January 31	-7.3	-19.9	5.4	-43.2

Weather Station Details

Years	Station	Coordinates
2004–2024	Thunder Bay CS	location
1941–2003	Thunder Bay A	location