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Thunder Bay March Weather

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

Typical Thunder Bay March Weather 1991–2020
Average daily high	1.0 °C
Average daily low	-11.4 °C
Average monthly precipitation	2.9 cm
Daily chance of precipitation	34.1%

Thunder Bay March Weather Records 1941–2024
Highest temperature	23.8 °C	March 31, 2010
Lowest temperature	-36.7 °C	March 2, 1943
Highest daily low	5.3 °C	March 23, 2012
Lowest daily high	-18.6 °C	March 2, 2003
Hottest average high temperature	6.6 °C	2012
Coldest average high temperature	-3.8 °C	1955
Most daily precipitation	4.2 cm	March 14, 1957
Most monthly precipitation	10.3 cm	1979

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
March 1	-2.5	-15.7	8.5	-31.7
March 2	-2.2	-15.5	7.7	-36.7
March 3	-1.9	-15.1	11.2	-33.4
March 4	-1.7	-14.8	13.4	-33.1
March 5	-1.5	-14.5	7.8	-33.7
March 6	-1.3	-14.3	9.7	-33.2
March 7	-1.1	-14.1	15.9	-34.7
March 8	-0.8	-13.8	10.1	-33.9
March 9	-0.6	-13.5	12.4	-29.8
March 10	-0.4	-13.3	10.9	-31.1
March 11	-0.2	-13.0	15.9	-28.9
March 12	0.0	-12.8	16.0	-30.5
March 13	0.3	-12.4	15.6	-27.2
March 14	0.6	-12.1	16.5	-26.1
March 15	0.9	-11.7	17.4	-29.4
March 16	1.1	-11.4	14.2	-28.3
March 17	1.4	-11.0	16.5	-29.4
March 18	1.7	-10.6	15.7	-29.4
March 19	2.0	-10.2	18.9	-28.3
March 20	2.3	-9.8	21.1	-28.9
March 21	2.5	-9.5	14.3	-24.4
March 22	2.8	-9.2	16.5	-26.7
March 23	3.1	-8.9	13.1	-25.6
March 24	3.3	-8.7	15.4	-30.0
March 25	3.5	-8.4	12.8	-27.2
March 26	3.8	-8.2	20.4	-26.8
March 27	4.0	-7.9	19.4	-23.3
March 28	4.2	-7.7	22.8	-22.8
March 29	4.4	-7.4	15.0	-26.7
March 30	4.7	-7.2	13.8	-22.2
March 31	4.9	-6.9	23.8	-24.4

Weather Station Details

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