Weather on April 21 in Calgary
Historical weather data for April 21 in Calgary, Canada
Avg High14°C (57°F)
Avg Low0°C (32°F)
Warmest201514°C
Coldest2008-9°C
Based on 55 years of data from CALGARY GLENMORE DAM
About This Date
April 21st in Calgary, Canada typically brings cool spring weather, with average highs around 14°C and lows near 0°C — a 25°F daily swing. Over 55 years of records, the warmest April 21st was in 2015 (14°C average), while the coldest was 2008 (-9°C) — a 42°F range across recorded history. Precipitation has occurred on 15% of recorded April 21st dates, with snow falling 9% of the time. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Calgary? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 4°C (39°F) | 1°C (33°F) | -- |
| 2024 | 13°C (55°F) | -1°C (31°F) | 0" |
| 2023 | 0°C (32°F) | -4°C (25°F) | 0.14" |
| 2022 | 5°C (41°F) | -5°C (23°F) | 0" |
| 2021 | 19°C (66°F) | -1°C (30°F) | 0" |
| 2020 | 19°C (67°F) | 7°C (44°F) | 0" |
| 2019 | 17°C (62°F) | -1°C (30°F) | 0" |
| 2018 | 15°C (59°F) | 2°C (35°F) | 0" |
| 2017 | 11°C (51°F) | 3°C (37°F) | 0.04" |
| 2016 | 23°C (74°F) | 2°C (36°F) | 0" |
| 2015 | 22°C (71°F) | 8°C (46°F) | 0" |
| 2014 | 17°C (63°F) | 1°C (33°F) | 0" |
| 2013 | -1°C (31°F) | -7°C (20°F) | 0" |
| 2012 | 15°C (59°F) | -3°C (26°F) | 0" |
| 2011 | 7°C (44°F) | -4°C (25°F) | 0" |
| 2010 | 22°C (71°F) | 4°C (40°F) | 0" |
| 2009 | 22°C (71°F) | 3°C (38°F) | 0" |
| 2008 | -7°C (20°F) | -11°C (13°F) | 0.2" |
| 2007 | 8°C (47°F) | -2°C (29°F) | -- |
| 2006 | 23°C (74°F) | 4°C (40°F) | 0" |
| 2005 | 20°C (68°F) | 2°C (35°F) | 0" |
| 2004 | 13°C (55°F) | -2°C (29°F) | 0" |
| 2003 | 21°C (70°F) | 1°C (33°F) | 0" |
| 2002 | 17°C (63°F) | 2°C (35°F) | 0" |
| 2001 | 9°C (48°F) | -6°C (21°F) | 0" |
| 2000 | 21°C (69°F) | -2°C (29°F) | 0" |
| 1999 | 5°C (41°F) | 1°C (33°F) | 1.46" |
| 1998 | 22°C (72°F) | 1°C (34°F) | 0" |
| 1997 | 12°C (54°F) | 1°C (34°F) | 0.16" |
| 1996 | 9°C (48°F) | -3°C (27°F) | 0" |
| 1995 | 11°C (51°F) | -1°C (30°F) | 0" |
| 1994 | 23°C (74°F) | 4°C (40°F) | 0" |
| 1993 | 17°C (63°F) | -3°C (26°F) | 0" |
| 1992 | 14°C (57°F) | 2°C (35°F) | 0.02" |
| 1991 | 19°C (67°F) | -2°C (29°F) | 0" |
| 1990 | 19°C (67°F) | 5°C (41°F) | 0" |
| 1989 | 19°C (67°F) | 5°C (41°F) | 0" |
| 1988 | 13°C (56°F) | -3°C (27°F) | 0" |
| 1987 | 18°C (64°F) | 3°C (37°F) | 0" |
| 1986 | 19°C (67°F) | 5°C (41°F) | 0.1" |
| 1985 | 3°C (38°F) | -2°C (29°F) | 0.04" |
| 1984 | 18°C (64°F) | -- | 0" |
| 1983 | 22°C (72°F) | 2°C (36°F) | 0" |
| 1982 | 22°C (72°F) | 1°C (34°F) | 0" |
| 1981 | 17°C (62°F) | 4°C (39°F) | 0" |
| 1980 | 9°C (48°F) | 2°C (36°F) | 0" |
| 1979 | 7°C (45°F) | -2°C (29°F) | 0" |
| 1978 | 4°C (39°F) | 1°C (33°F) | -- |
| 1977 | 12°C (54°F) | -6°C (22°F) | 0" |
| 1976 | 9°C (48°F) | 1°C (33°F) | 0" |
| 1975 | 11°C (51°F) | -4°C (25°F) | 0" |
| 1974 | 14°C (57°F) | -2°C (28°F) | 0" |
| 1973 | 14°C (58°F) | -2°C (28°F) | 0" |
| 1972 | 12°C (53°F) | 1°C (33°F) | 0" |
| 1971 | 14°C (58°F) | 2°C (35°F) | 0" |