Annual mean 8°C · wettest around December · prevailing wind W
Warmest
25.4 °C
Coldest
-6.8 °C
Wettest
30%
Windiest
4.0 m/s
Prevailing
W
3.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Montréal over the whole year is 8°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -8°C. Montréal has no sharply defined rainy season: the chance of rain on a given day runs from 12% in September, the driest month, to 24% in December, the wettest. Winds in Montréal are highest in February, averaging 3.3 m/s (12 km/h), and lightest in September, at 2.3 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Montréal come in July, when the sky is typically 36% covered; December is the cloudiest month, at 66%.
Month by month Montréal climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-6°C
-8°C
-11°C
23%
63%
3.1 m/s
0
0
0
February
-4°C
-8°C
-10°C
21%
54%
3.3 m/s
0
0
1
March
1°C
-3°C
-4°C
20%
52%
3.2 m/s
0
0
6
April
9°C
3°C
4°C
22%
49%
3.2 m/s
6
0
33
May
17°C
11°C
14°C
14%
44%
2.9 m/s
42
8
69
June
22°C
17°C
21°C
16%
42%
2.8 m/s
69
24
60
July
25°C
20°C
25°C
14%
36%
2.5 m/s
68
53
33
August
24°C
18°C
24°C
14%
37%
2.4 m/s
73
44
41
September
20°C
14°C
19°C
12%
36%
2.3 m/s
65
19
69
October
13°C
8°C
10°C
18%
52%
2.6 m/s
26
1
61
November
4°C
1°C
-0°C
19%
59%
2.9 m/s
4
0
15
December
-3°C
-5°C
-8°C
24%
66%
3.1 m/s
0
0
2
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Montréal weather by season
Year round, Montréal has days of about -6°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -8°C to 20°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around December and least likely around September. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Montréal weather in winterDecember to February
High -4°CLow -7°CRain 23%
Winter in Montréal has typical daily highs of about -4°C and lows of about -7°C, with a 23% chance of rain on a given day.
Montréal weather in springMarch to May
High 9°CLow 4°CRain 19%
Spring in Montréal has typical daily highs of about 9°C and lows of about 4°C, with a 19% chance of rain on a given day.
Montréal weather in summerJune to August
High 24°CLow 18°CRain 14%
Summer in Montréal has typical daily highs of about 24°C and lows of about 18°C, with a 14% chance of rain on a given day.
Montréal weather in autumnSeptember to November
High 12°CLow 7°CRain 16%
Autumn in Montréal has typical daily highs of about 12°C and lows of about 7°C, with a 16% chance of rain on a given day.
When is the rainy season in Montréal?
Montréal has no sharply defined rainy season: the chance of rain on a given day runs from 12% in September, the driest month, to 24% in December, the wettest.
What time of year is Montréal windiest?
Winds in Montréal are highest in February, averaging 3.3 m/s (12 km/h), and lightest in September, at 2.3 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Montréal year round?
The average temperature in Montréal over the whole year is 8°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -8°C.