Weather in Thunder Bay District

Calculated from weather data of Thunder Bay Airport (CYQT) between 2020 and 2024.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	-7.7	-6.5	-5.2	-11.8	-4.2	-5.9
February	-6.9	0.2	-5.5	-9.6	-8.5	-4.7
March	1.8	3.3	0.4	0.2	5.2	2.5
April	7.4		5.7	3.9	10.0	7.5
May	16.4		17.6	16.1	16.8	16.6
June	22.6		23.3	22.8	24.8	23.3
July	25.8		24.1	24.8	26.8	27.1
August	23.8		23.3	24.6	25.8	23.6
September	19.0		20.6	19.3	20.5	17.5
October	10.8		11.0	12.6	14.3	7.4
November	2.2		3.7	3.2	3.7	5.7
December	-4.9		2.5	-3.2	-3.2	-4.7
Average	8.4	-1.3	10.3	9.4	11.2	10.1

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	-16.1	-13	-13	-23	-14	-13
February	-18.8	-11	-16	-23	-20	-17
March	-10.3	-7	-11	-11	-8	-8
April	-4.7		-3	-3	-1	-4
May	2.8		4	4	3	3
June	9.1		10	9	11	9
July	12.0		11	11	12	13
August	11.6		11	13	13	12
September	8.1		10	7	8	6
October	1.9		3	2	6	-1
November	-6.2		-5	-4	-4	-4
December	-12.3		-5	-11	-14	-12
Average	-3.4	-11.6	-1.7	-2.0	-1.5	-2.6

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
30 °C or warmer	0	5	5	15	5
25 °C or warmer	0	37	31	54	49
20 °C or warmer	0	100	100	112	94
0 °C or colder	84	166	170	173	195

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	30.9	32	27	42	12	39
February	24.8	15	24	40	24	21
March	15.2	21	20	30	5	14
April	18.4		31	31	19	6
May	10.6		11	12	9	7
June	8.5		6	12	8	8
July	6.3		8	11	1	6
August	7.0		9	6	5	7
September	9.3		6	13	7	8
October	14.8		16	11	6	14
November	22.6		12	39	9	14
December	29.0		22	44	41	24
Average	16.2	22.4	15.5	22.1	11.0	12.8

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (km/h)

Month	Average	2024	2023	2022	2021	2020
January	12.8	12	12	15	12	13
February	14.6	13	16	14	15	15
March	16.0	17	15	17	16	15
April	16.6		17	18	16	17
May	15.1		16	16	15	15
June	13.7		13	16	13	15
July	12.3		11	14	12	12
August	12.7		12	13	15	13
September	13.3		12	12	14	15
October	14.0		12	14	13	14
November	14.3		14	14	16	15
December	13.2		11	15	14	13
Average	14.1	14.2	13.4	14.8	14.1	14.2

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	W	W	W	W	W
February	NW	W	W	W	W
March	NW	NE	NW	NW	N
April		NE	NE	NE	NW
May		NE	E	E	NE
June		E	NW	S	NE
July		W	W	S	SW
August		W	W	SW	SE
September		E	N	SW	W
October		NW	W	N	W
November		W	N	NW	W
December		NW	E	NW	W

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Thunder Bay District weather Q&A

What is the warmest month in Thunder Bay District?

The warmest month is July with an average temperature of 26 °C over the past years.

What is the coldest month in Thunder Bay District?

The coldest month is January with an average daytime temperature of -6 °C in the past few years.

Which month is the wettest in Thunder Bay District?

Chance of precipitation is the highest in January with a probability of around 30.9 %.

Which month is the driest in Thunder Bay District?

The least rainfall and snow can be expected in July. The probability is about 6.3 %.