Weather on October 21 in Calgary
Historical weather data for October 21 in Calgary, Canada
Based on 54 years of data from CALGARY GLENMORE DAM
About This Date
October 21st in Calgary, Canada typically brings cool fall weather, with average highs around 11°C and lows near -1°C. Over 54 years of records, the warmest October 21st was in 2003 (17°C average), while the coldest was 2020 (-6°C) — a 41°F range across recorded history. Precipitation has occurred on 22% of recorded October 21st dates, with snow falling 13% of the time (heaviest snowfall: 3.6"). The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for October 21st in Calgary? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 13°C (56°F) | 3°C (37°F) | -- |
| 2023 | 10°C (50°F) | 1°C (33°F) | 0 mm |
| 2022 | 6°C (42°F) | 1°C (34°F) | 5 mm |
| 2021 | 16°C (61°F) | 3°C (37°F) | 0 mm |
| 2020 | -3°C (27°F) | -9°C (16°F) | 6 mm |
| 2019 | 11°C (51°F) | -3°C (26°F) | 0 mm |
| 2018 | 12°C (54°F) | -3°C (27°F) | 0 mm |
| 2017 | 10°C (50°F) | -4°C (25°F) | 0 mm |
| 2016 | 12°C (54°F) | -2°C (28°F) | 2 mm |
| 2015 | 20°C (68°F) | 2°C (35°F) | 0 mm |
| 2014 | 17°C (62°F) | 6°C (42°F) | 0 mm |
| 2013 | 17°C (63°F) | 3°C (38°F) | 0 mm |
| 2012 | -3°C (26°F) | -6°C (22°F) | 1 mm |
| 2011 | 11°C (51°F) | -2°C (29°F) | 0 mm |
| 2010 | 21°C (70°F) | 3°C (37°F) | 0 mm |
| 2009 | 8°C (47°F) | 1°C (33°F) | 0 mm |
| 2008 | 10°C (50°F) | 3°C (38°F) | 0 mm |
| 2007 | 11°C (51°F) | -7°C (20°F) | 0 mm |
| 2006 | 7°C (45°F) | -2°C (29°F) | 4 mm |
| 2005 | 11°C (51°F) | -7°C (20°F) | 0 mm |
| 2004 | -2°C (29°F) | -5°C (23°F) | 8 mm |
| 2003 | 25°C (77°F) | 8°C (46°F) | 0 mm |
| 2002 | 7°C (44°F) | -4°C (24°F) | 11 mm |
| 2001 | 6°C (43°F) | -5°C (23°F) | 0 mm |
| 2000 | 11°C (52°F) | -2°C (29°F) | -- |
| 1999 | 23°C (73°F) | -- | -- |
| 1998 | 22°C (72°F) | 1°C (34°F) | 0 mm |
| 1997 | 13°C (56°F) | 0°C (32°F) | 0 mm |
| 1996 | 11°C (52°F) | -4°C (24°F) | 0 mm |
| 1995 | 10°C (50°F) | -3°C (26°F) | 0 mm |
| 1994 | 10°C (50°F) | -2°C (29°F) | 0 mm |
| 1993 | 14°C (57°F) | 2°C (36°F) | 0 mm |
| 1992 | 12°C (53°F) | 2°C (35°F) | 3 mm |
| 1991 | 7°C (45°F) | -6°C (21°F) | 6 mm |
| 1990 | 12°C (54°F) | -2°C (28°F) | 0 mm |
| 1989 | 16°C (61°F) | 1°C (33°F) | 0 mm |
| 1988 | 21°C (70°F) | 2°C (35°F) | 2 mm |
| 1987 | 9°C (49°F) | 3°C (37°F) | 0 mm |
| 1986 | 18°C (64°F) | 7°C (44°F) | 0 mm |
| 1985 | 19°C (66°F) | 6°C (43°F) | 0 mm |
| 1984 | 2°C (36°F) | -11°C (12°F) | 0 mm |
| 1983 | 16°C (61°F) | -1°C (30°F) | 0 mm |
| 1982 | 14°C (57°F) | 3°C (38°F) | 0 mm |
| 1981 | 3°C (38°F) | -6°C (21°F) | 0 mm |
| 1980 | 2°C (36°F) | 1°C (33°F) | 28 mm |
| 1979 | 2°C (35°F) | -9°C (16°F) | 0 mm |
| 1978 | 6°C (42°F) | -2°C (28°F) | 0 mm |
| 1977 | 12°C (53°F) | -5°C (23°F) | 0 mm |
| 1976 | 12°C (53°F) | -5°C (23°F) | 5 mm |
| 1975 | 6°C (43°F) | -5°C (23°F) | 0 mm |
| 1974 | 12°C (53°F) | 2°C (36°F) | 0 mm |
| 1973 | 8°C (47°F) | 5°C (41°F) | 0 mm |
| 1972 | 9°C (48°F) | 0°C (32°F) | 0 mm |
| 1971 | 10°C (50°F) | -4°C (24°F) | 0 mm |