Historical Weather in Montreal, Canada
See 55+ years of weather history for any date in Montreal going back to 1970.
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Monthly Climate Averages
Historical temperature and precipitation averages for Montreal, Canada, based on 55+ years of weather data.
Temperatures shown in Celsius with Fahrenheit in parentheses. Rainfall in millimetres, snowfall in centimetres.
Montreal Weather by Month
January in Montreal has become 1.8°C (3.2°F) warmer on average: the 2012–2026 average against 1970–1989.
The February heat record, 15°C (59°F) on February 22, 1981, has stood for 45 years.
The coldest March reading, -25°C (-13°F) on March 12, 1984, has not been matched in 42 years.
The April heat record, 30°C (86°F) on April 27, 1990, has stood for 36 years.
The coldest May reading, -3°C (26°F) on May 7, 1995, has not been matched in 31 years.
The coldest June reading, 3°C (38°F) on June 9, 1980, has not been matched in 46 years.
5 of the 10 warmest Julys on record in Montreal have come since 2012.
The August heat record, 36°C (96°F) on August 1, 1975, has stood for 51 years.
September in Montreal has become 1.8°C (3.2°F) warmer on average: the 2011–2025 average against 1970–1989.
8 of the 10 warmest Octobers on record in Montreal have come since 2011.
The coldest November reading, -20°C (-4°F) on November 30, 1995, has not been matched in 31 years.
December in Montreal has become 2.5°C (4.4°F) warmer on average: the 2011–2025 average against 1970–1989.
Source: NOAA GHCN-Daily, Mctavish (1994–2026); Montreal Mcgill (1971–1993); Montreal/St-Hubert A (1979–2009). Records through 2026.