Weather in Outaouais

Calculated from weather data of Ottawa/Macdonald-Cartier International Airport (CYOW) between 2020 and 2024.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	-5.8	-3.2	-2.1	-9.9	-5.9	-3.7
February	-2.4	1.7	-2.3	-4.7	-4.3	-2.3
March	3.1	7.2	2.5	3.2	6.0	4.2
April	11.3		13.8	11.5	14.1	9.8
May	19.5		20.3	21.8	19.6	19.1
June	24.4		24.6	23.5	26.6	25.1
July	27.5		27.1	26.6	25.3	30.0
August	25.5		24.1	25.6	27.6	24.8
September	21.5		23.0	20.1	21.3	19.8
October	14.4		15.5	15.5	16.0	12.5
November	5.1		4.7	8.0	5.5	8.6
December	-1.0		1.3	0.8	0.8	0.2
Average	10.9	2.0	12.8	12.6	13.0	12.5

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	-12.4	-9	-8	-19	-10	-9
February	-11.3	-7	-11	-14	-13	-11
March	-6.6	-3	-5	-6	-6	-3
April	1.3		3	1	3	0
May	7.8		7	9	8	7
June	13.3		14	13	15	14
July	16.4		17	16	15	18
August	15.3		14	16	17	15
September	11.1		12	11	12	10
October	5.5		8	4	8	4
November	-3.6		-3	0	-2	0
December	-8.2		-4	-5	-7	-6
Average	1.6	-7.9	3.6	2.6	3.4	3.2

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	10	6	14	21
25 °C or warmer	0	64	58	68	70
20 °C or warmer	0	139	121	136	112
0 °C or colder	72	136	126	137	140

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	29.6	31	43	19	22	25
February	25.2	11	33	28	26	25
March	22.3	20	30	28	13	21
April	19.2		17	20	12	17
May	11.2		12	10	7	4
June	10.0		9	17	7	4
July	6.0		6	8	7	5
August	6.6		6	12	3	12
September	7.1		3	10	9	9
October	16.1		21	9	16	19
November	17.8		13	11	14	16
December	27.8		37	26	20	27
Average	16.2	20.3	17.7	15.8	11.8	14.2

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	16.0	16	15	15	16	16
February	17.2	16	18	20	15	18
March	18.5	18	18	18	20	17
April	18.9		19	19	18	19
May	16.2		17	15	16	18
June	15.1		14	15	16	15
July	13.9		13	15	13	14
August	13.4		14	13	13	13
September	13.3		12	14	15	15
October	15.3		15	14	14	15
November	17.1		17	18	15	18
December	15.9		14	18	16	17
Average	16.0	16.7	15.3	16.0	15.5	16.0

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	NW	NW	NW	W
February	W	NW	W	W	W
March	W	NW	W	W	N
April		SE	NW	NW	NW
May		NW	S	W	W
June		NE	W	SW	W
July		SW	W	NW	W
August		W	W	SW	W
September		W	NW	W	SW
October		W	SW	NE	W
November		SW	SW	W	SW
December		N	NW	W	W

Prevailing wind direction

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

Outaouais weather Q&A

What is the warmest month in Outaouais?

The warmest month is July with an average temperature of 28 °C over the past years.

What is the coldest month in Outaouais?

The coldest month is January with an average daytime temperature of -4 °C in the past few years.

Which month is the wettest in Outaouais?

Chance of precipitation is the highest in January with a probability of around 29.6 %.

Which month is the driest in Outaouais?

The least rainfall and snow can be expected in July. The probability is about 6.1 %.