Weather on December 21 in Montreal
Historical weather data for December 21 in Montreal, Canada
Based on 51 years of data from MONTREAL MCGILL
About This Date
December 21st in Montreal, Canada typically brings very cold winter weather, with average highs around -2°C and lows near -9°C. Over 51 years of records, the warmest December 21st was in 1994 (5°C average), while the coldest was 2004 (-19°C) — a 44°F range across recorded history. Precipitation has occurred on 51% of recorded December 21st dates, with snow falling 24% of the time (heaviest snowfall: 8.1"). The last decade has been 6.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.7°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Montreal? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 3°C (38°F) | -5°C (23°F) | -- |
| 2023 | -4°C (24°F) | -9°C (16°F) | 0" |
| 2022 | 1°C (34°F) | -6°C (21°F) | 0" |
| 2021 | 2°C (35°F) | -7°C (20°F) | 0.07" |
| 2020 | 3°C (38°F) | 0°C (32°F) | 0.04" |
| 2019 | -9°C (16°F) | -13°C (8°F) | 0" |
| 2018 | 6°C (43°F) | 1°C (33°F) | 3.98" |
| 2017 | -9°C (15°F) | -14°C (7°F) | 0" |
| 2016 | 3°C (37°F) | -2°C (28°F) | 0.05" |
| 2015 | 4°C (40°F) | 0°C (32°F) | 0.85" |
| 2014 | -7°C (19°F) | -9°C (15°F) | -- |
| 2013 | -7°C (20°F) | -8°C (17°F) | 1.32" |
| 2012 | 3°C (37°F) | 1°C (33°F) | 2.58" |
| 2011 | 0°C (32°F) | -5°C (23°F) | 0.7" |
| 2010 | -2°C (29°F) | -6°C (22°F) | 0" |
| 2009 | -6°C (22°F) | -12°C (11°F) | 0" |
| 2008 | -10°C (14°F) | -18°C (0°F) | 1.56" |
| 2007 | -3°C (27°F) | -7°C (20°F) | 0" |
| 2006 | 6°C (42°F) | -2°C (29°F) | 0" |
| 2005 | -6°C (21°F) | -17°C (2°F) | 0.16" |
| 2004 | -15°C (5°F) | -24°C (-11°F) | 0" |
| 2003 | 1°C (33°F) | -13°C (9°F) | 0.47" |
| 2002 | 3°C (37°F) | 0°C (32°F) | 0" |
| 2001 | -1°C (31°F) | -5°C (23°F) | 0.12" |
| 2000 | -8°C (17°F) | -13°C (8°F) | 0" |
| 1999 | 5°C (41°F) | -4°C (25°F) | 0.1" |
| 1997 | -8°C (17°F) | -14°C (7°F) | 0" |
| 1996 | -1°C (30°F) | -8°C (17°F) | 0" |
| 1994 | 7°C (44°F) | 3°C (38°F) | 0" |
| 1992 | -3°C (26°F) | -11°C (13°F) | 0" |
| 1991 | 3°C (37°F) | -3°C (27°F) | 0" |
| 1990 | 1°C (33°F) | -12°C (10°F) | 1.23" |
| 1989 | -17°C (1°F) | -18°C (0°F) | 0" |
| 1988 | 8°C (46°F) | 1°C (33°F) | 0" |
| 1987 | 3°C (37°F) | 1°C (34°F) | 0" |
| 1986 | 0°C (32°F) | -10°C (14°F) | 0" |
| 1985 | -9°C (15°F) | -17°C (1°F) | 0.16" |
| 1984 | 3°C (37°F) | -12°C (10°F) | 1.27" |
| 1983 | -6°C (21°F) | -22°C (-8°F) | 0.55" |
| 1982 | -3°C (26°F) | -5°C (23°F) | 0.07" |
| 1981 | -2°C (28°F) | -13°C (9°F) | 0.25" |
| 1980 | -16°C (4°F) | -19°C (-3°F) | 0" |
| 1979 | 0°C (32°F) | -17°C (1°F) | 0" |
| 1978 | -2°C (28°F) | -11°C (12°F) | 0.15" |
| 1977 | 1°C (33°F) | -2°C (29°F) | 1.63" |
| 1976 | -13°C (9°F) | -15°C (5°F) | 0.03" |
| 1975 | -11°C (13°F) | -21°C (-5°F) | 0" |
| 1974 | -2°C (28°F) | -4°C (24°F) | 0.03" |
| 1973 | -1°C (30°F) | -9°C (16°F) | 2.16" |
| 1972 | -4°C (24°F) | -14°C (7°F) | 1.17" |
| 1971 | 3°C (37°F) | -6°C (22°F) | 0.15" |