Montreal Weather in December
In December, Montreal averages a high of -1°C (30°F) and a low of -8°C (18°F), from 54 years of daily records (1971–2026).
-1°C
Average high
30°F
-8°C
Average low
18°F
17°C
Record high
63°F · December 6, 2001
-30°C
Record low
-23°F · December 25, 1980
What December Is Like in Montreal
- December in Montreal has become 2.5°C (4.4°F) warmer on average: the 2011–2025 average against 1970–1989.
- The coldest December reading, -30°C (-23°F) on December 25, 1980, has not been matched in 46 years.
- Snow falls on about 12 days in a typical December.
- On average, 27 nights in December drop below freezing.
At least 1 mm of rain falls on 43% of December days, and the month averages 101 mm in total.
Warmest: 2015 (4.3°C)Latest: 2025 (-2.6°C)10-year averageLong-run average (-1.3°C)
Look Up a Day in December
See the weather in Montreal on any December date, year by year.
Source: NOAA GHCN-Daily, Mctavish (1994–2026); Montreal Mcgill (1971–1993); Montreal/St-Hubert A (1979–2009). Averages cover 1971–2026. How we compute this