< Previous Month Next Month >

Thunder Bay October Weather

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

Typical Thunder Bay October Weather 1991–2020
Average daily high	10.6 °C
Average daily low	-0.4 °C
Average monthly precipitation	6.0 cm
Daily chance of precipitation	44.3%

Thunder Bay October Weather Records 1941–2024
Highest temperature	30.0 °C	October 2, 2023
Lowest temperature	-13.5 °C	October 30, 2020
Highest daily low	20.0 °C	October 8, 2011
Lowest daily high	-3.9 °C	October 31, 1951
Hottest average high temperature	17.7 °C	1963
Coldest average high temperature	6.9 °C	2002
Most daily precipitation	5.1 cm	October 26, 2010
Most monthly precipitation	16.7 cm	1970

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
October 1	14.9	2.4	25.0	-6.0
October 2	14.6	2.2	30.0	-8.1
October 3	14.3	2.0	28.6	-7.8
October 4	14.0	1.8	24.4	-6.4
October 5	13.8	1.6	26.7	-7.2
October 6	13.5	1.4	26.1	-8.5
October 7	13.2	1.2	24.4	-7.3
October 8	12.9	1.1	28.3	-8.3
October 9	12.6	0.9	25.6	-7.8
October 10	12.3	0.7	23.4	-7.2
October 11	12.0	0.5	24.4	-6.9
October 12	11.7	0.3	26.1	-8.7
October 13	11.5	0.1	24.4	-7.3
October 14	11.2	0.0	26.7	-8.8
October 15	10.9	-0.1	26.7	-7.3
October 16	10.7	-0.3	23.9	-8.4
October 17	10.4	-0.4	25.6	-12.2
October 18	10.2	-0.6	21.1	-9.4
October 19	9.9	-0.6	25.1	-10.6
October 20	9.7	-0.8	25.8	-11.1
October 21	9.4	-1.0	21.5	-8.3
October 22	9.2	-1.2	23.9	-10.0
October 23	8.9	-1.3	23.6	-12.8
October 24	8.6	-1.6	24.4	-10.0
October 25	8.3	-1.8	18.9	-10.1
October 26	8.0	-2.0	23.4	-13.3
October 27	7.6	-2.2	20.1	-13.1
October 28	7.3	-2.5	18.7	-13.3
October 29	7.1	-2.7	17.8	-11.8
October 30	6.9	-2.9	22.9	-13.5
October 31	6.6	-3.0	18.3	-13.2

Weather Station Details

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