Weather on December 21 in Calgary
Historical weather data for December 21 in Calgary, Canada
Based on 53 years of data from CALGARY GLENMORE DAM
About This Date
December 21st in Calgary, Canada typically brings very cold winter weather, with average highs around -3°C and lows near -13°C. Over 53 years of records, the warmest December 21st was in 1985 (7°C average), while the coldest was 2022 (-29°C) — a 65°F range across recorded history. Precipitation has occurred on 17% of recorded December 21st dates, with snow falling 11% of the time. The last decade has been 7.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 7.4°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Calgary? Bundle up with warm layers and protect extremities from the cold.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | -3°C (26°F) | -20°C (-4°F) | -- |
| 2023 | 8°C (47°F) | -1°C (31°F) | 0" |
| 2022 | -27°C (-17°F) | -32°C (-25°F) | 0" |
| 2021 | 1°C (34°F) | -18°C (0°F) | 0" |
| 2020 | 3°C (38°F) | -4°C (25°F) | 0.87" |
| 2019 | 1°C (34°F) | -3°C (26°F) | 0" |
| 2018 | 4°C (40°F) | -3°C (26°F) | 0" |
| 2017 | -4°C (25°F) | -16°C (4°F) | 0.06" |
| 2016 | 5°C (41°F) | -7°C (19°F) | 0" |
| 2015 | -1°C (31°F) | -13°C (9°F) | 0" |
| 2014 | 6°C (42°F) | -4°C (24°F) | 0" |
| 2013 | -11°C (12°F) | -18°C (-1°F) | 0.02" |
| 2012 | -14°C (6°F) | -18°C (-1°F) | 0" |
| 2011 | 0°C (32°F) | -9°C (16°F) | 0.12" |
| 2010 | -2°C (29°F) | -18°C (-1°F) | 0" |
| 2009 | -12°C (11°F) | -13°C (9°F) | 0.03" |
| 2008 | -19°C (-2°F) | -30°C (-22°F) | 0.08" |
| 2007 | -4°C (25°F) | -18°C (0°F) | 0" |
| 2006 | 9°C (49°F) | -4°C (24°F) | 0" |
| 2005 | 10°C (50°F) | 2°C (35°F) | 0" |
| 2004 | -4°C (25°F) | -12°C (10°F) | 0.16" |
| 2003 | 5°C (41°F) | -7°C (20°F) | -- |
| 2002 | -6°C (22°F) | -19°C (-3°F) | 0" |
| 2001 | -6°C (21°F) | -17°C (2°F) | 0" |
| 2000 | -8°C (17°F) | -21°C (-6°F) | 0" |
| 1999 | 5°C (41°F) | -- | -- |
| 1998 | -10°C (14°F) | -29°C (-21°F) | 0" |
| 1997 | 1°C (34°F) | -14°C (6°F) | 0" |
| 1996 | -22°C (-7°F) | -29°C (-21°F) | 0.08" |
| 1995 | -6°C (22°F) | -16°C (4°F) | 0" |
| 1994 | 8°C (47°F) | -7°C (19°F) | 0" |
| 1993 | -2°C (28°F) | -10°C (14°F) | 0" |
| 1991 | 8°C (46°F) | -5°C (23°F) | 0" |
| 1990 | -18°C (-1°F) | -31°C (-23°F) | 0" |
| 1989 | -7°C (19°F) | -32°C (-26°F) | 0" |
| 1988 | -6°C (22°F) | -12°C (10°F) | 0" |
| 1987 | 2°C (36°F) | -3°C (27°F) | 0" |
| 1986 | 9°C (49°F) | 2°C (35°F) | 0" |
| 1985 | 11°C (52°F) | 3°C (37°F) | 0" |
| 1984 | -14°C (7°F) | -22°C (-8°F) | 0" |
| 1983 | -18°C (0°F) | -31°C (-23°F) | 0" |
| 1982 | -10°C (14°F) | -12°C (11°F) | 0.16" |
| 1981 | 1°C (34°F) | -7°C (19°F) | 0" |
| 1980 | -20°C (-4°F) | -22°C (-8°F) | 0" |
| 1979 | 3°C (37°F) | -6°C (21°F) | 0" |
| 1978 | -1°C (30°F) | -9°C (16°F) | 0" |
| 1977 | 0°C (32°F) | -5°C (23°F) | 0" |
| 1976 | 3°C (38°F) | -6°C (21°F) | 0" |
| 1975 | 3°C (37°F) | -12°C (11°F) | 0" |
| 1974 | 4°C (39°F) | -5°C (23°F) | 0" |
| 1973 | 7°C (44°F) | -5°C (23°F) | 0" |
| 1972 | 7°C (45°F) | -1°C (31°F) | 0" |
| 1971 | -16°C (3°F) | -24°C (-12°F) | 0" |