Montreal, Canada Climate & Monthly Averages
The climate of Montreal
Seasons are the whole story in Montreal. The gap between an average July and an average January is 30°C - warm summers and cold, often snowy winters - which in practice means 77°F (25°C) afternoons at one end of the calendar and 22°F (-6°C) at the other.
Climate quick facts
- Hottest month: July - highs near 77°F (25°C)
- Coldest month: January - highs near 22°F (-6°C)
- Decade extremes (2015-2024): 92°F (34°C) high · -27°F (-33°C) low
- Wettest month: October (12 rainy days) · Sunniest: July (11.9 h sun/day)
- Climate type: humid continental
- Annual swing: 30°C between the average warmest and coolest month · day to night: 9°C
- Snow: about 32 days a year
- Months with freezing average lows: 6
- Average humidity: 72%
Temperatures through the year
January sits at the other end of the year: 22°F (-6°C) by day, 7°F (-14°C) at night. At its warmest, in July, Montreal runs to 77°F (25°C) in the afternoon and back to 62°F (17°C) by dawn. The gridded 2015-2024 daily record for this location tops out at 92°F (34°C) and bottoms at -27°F (-33°C) - decade extremes, not all-time station records. October is the wettest month at 4.9 inches (126 mm) over 12 days; February is the driest.
Rain, sun and snow
Between the average July and the average January lie 30°C, a wider spread than 97% of the 3496 cities in our dataset. Snow falls on roughly 32 days a year, mostly November through April.
How Montreal compares
- Montreal averages 43°F (6°C) across the year - cooler than all but 3% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 22° | 7° | 12 | 3.1 in | 5.0 h/day | 9.1 h | 39% | 77% |
| February | 25° | 8° | 11 | 3.0 in | 6.2 h/day | 10.3 h | 39% | 75% |
| March | 35° | 19° | 11 | 3.1 in | 7.7 h/day | 11.8 h | 37% | 70% |
| April | 49° | 31° | 12 | 4.5 in | 8.2 h/day | 13.5 h | 40% | 65% |
| May | 64° | 45° | 10 | 3.0 in | 10.4 h/day | 14.9 h | 33% | 63% |
| June | 72° | 55° | 14 | 4.6 in | 10.7 h/day | 15.7 h | 46% | 68% |
| July | 77° | 62° | 12 | 4.2 in | 11.9 h/day | 15.3 h | 40% | 72% |
| August | 75° | 61° | 13 | 4.8 in | 10.9 h/day | 14.1 h | 41% | 74% |
| September | 69° | 54° | 9 | 3.0 in | 9.5 h/day | 12.5 h | 29% | 75% |
| October | 55° | 42° | 12 | 4.9 in | 6.8 h/day | 10.8 h | 40% | 75% |
| November | 41° | 29° | 12 | 3.2 in | 5.4 h/day | 9.4 h | 40% | 74% |
| December | 29° | 17° | 13 | 3.6 in | 4.3 h/day | 8.7 h | 41% | 76% |
Montreal month by month
Average high and low for each month, with the bar showing where it sits in Montreal's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 12 days
- Sunshine
- 5.0 h
- Daylight
- 9.1 h
- Snow
- 9 days
February
- Rain
- 11 days
- Sunshine
- 6.2 h
- Daylight
- 10.3 h
- Snow
- 7 days
March
- Rain
- 11 days
- Sunshine
- 7.7 h
- Daylight
- 11.8 h
- Snow
- 5 days
April
- Rain
- 12 days
- Sunshine
- 8.2 h
- Daylight
- 13.5 h
- Snow
- 2 days
May
- Rain
- 10 days
- Sunshine
- 10.4 h
- Daylight
- 14.9 h
June
- Rain
- 14 days
- Sunshine
- 10.7 h
- Daylight
- 15.7 h
July
- Rain
- 12 days
- Sunshine
- 11.9 h
- Daylight
- 15.3 h
August
- Rain
- 13 days
- Sunshine
- 10.9 h
- Daylight
- 14.1 h
September
- Rain
- 9 days
- Sunshine
- 9.5 h
- Daylight
- 12.5 h
October
- Rain
- 12 days
- Sunshine
- 6.8 h
- Daylight
- 10.8 h
November
- Rain
- 12 days
- Sunshine
- 5.4 h
- Daylight
- 9.4 h
- Snow
- 3 days
December
- Rain
- 13 days
- Sunshine
- 4.3 h
- Daylight
- 8.7 h
- Snow
- 6 days
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Montreal
Spring (March through May)
Spring in Montreal stays firmly cold, with daytime highs averaging 50°F (10°C) and nights around 32°F (0°C); rain falls on around 34 of the 90 days, plus about 6 snowy days.
Summer (June through August)
Through summer, Montreal is mild and warm: 75°F (24°C) by day, 59°F (15°C) after dark, and rain falls on around 39 of the 90 days. Daylight is generous - around 11.2 hours of sun a day.
Fall (September through November)
Fall is mild here - highs near 55°F (13°C), nights near 41°F (5°C), and rain falls on around 33 of the 90 days, plus about 3 snowy days.
Winter (December through February)
Winter in Montreal is frigid, with daytime highs averaging 25°F (-4°C) and nights around 11°F (-12°C); rain falls on around 36 of the 90 days, plus about 22 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Climate questions, answered
Is Montreal humid?
How cold does Montreal get in winter?
How hot does Montreal get in summer?
Is Montreal warmer or cooler than most cities?
How warm is Montreal on average?
What should I pack for Montreal?
Best time to visit Montreal
Aim for May to September if you get the choice: these are the warmest and brightest weeks of the year, and highs average 72°F (22°C) against roughly 11 wet days a month. For the same question asked the other way round, see where else is warm in May.
Pack for Montreal with a heavy insulated coat, hat and gloves for winter and proper waterproofs rather than an umbrella - wet days are the norm here. Note the gap between afternoon and night: July pairs 77°F (25°C) with 62°F (17°C).
Montreal temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.