Weather on May 21 in Calgary
Historical weather data for May 21 in Calgary, Canada
Based on 54 years of data from CALGARY GLENMORE DAM
About This Date
May 21st in Calgary, Canada typically brings mild spring weather, with average highs around 16°C and lows near 4°C. Over 54 years of records, the warmest May 21st was in 2023 (19°C average), while the coldest was 1992 (0°C) — a 34°F range across recorded history. Precipitation has occurred on 30% of recorded May 21st dates, with snow falling 7% of the time (heaviest snowfall: 3.5"). The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Calgary? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 11°C (51°F) | 4°C (40°F) | -- |
| 2023 | 28°C (82°F) | 9°C (49°F) | 0" |
| 2022 | 11°C (52°F) | 0°C (32°F) | 0" |
| 2021 | 11°C (52°F) | 0°C (32°F) | 0" |
| 2020 | 8°C (46°F) | 2°C (36°F) | 3.23" |
| 2019 | 8°C (46°F) | 4°C (39°F) | 0.18" |
| 2018 | 23°C (74°F) | 9°C (48°F) | 0" |
| 2017 | 23°C (73°F) | 4°C (39°F) | 0.08" |
| 2016 | 7°C (45°F) | 2°C (36°F) | 1.01" |
| 2015 | 22°C (71°F) | 4°C (40°F) | 0" |
| 2014 | 24°C (75°F) | 7°C (44°F) | 0" |
| 2013 | 22°C (72°F) | 6°C (43°F) | 0" |
| 2012 | 21°C (69°F) | 8°C (46°F) | 0" |
| 2011 | 22°C (71°F) | 6°C (43°F) | 0" |
| 2010 | 15°C (59°F) | 2°C (35°F) | 0" |
| 2009 | 14°C (57°F) | -2°C (29°F) | 0" |
| 2008 | 12°C (54°F) | 6°C (43°F) | 1.58" |
| 2007 | 9°C (48°F) | 1°C (33°F) | 1.56" |
| 2006 | 26°C (78°F) | 8°C (47°F) | 0" |
| 2005 | 18°C (65°F) | 1°C (33°F) | 0" |
| 2004 | 9°C (48°F) | 4°C (39°F) | 0.02" |
| 2003 | 17°C (62°F) | 3°C (37°F) | 0" |
| 2002 | 14°C (57°F) | 0°C (32°F) | 0" |
| 2001 | 21°C (69°F) | -2°C (28°F) | 0" |
| 2000 | 22°C (72°F) | -- | -- |
| 1999 | 16°C (61°F) | 4°C (39°F) | 0.36" |
| 1998 | 21°C (70°F) | 10°C (50°F) | 1.4" |
| 1997 | 2°C (36°F) | -2°C (29°F) | 0.18" |
| 1996 | 14°C (58°F) | 0°C (32°F) | 0" |
| 1995 | 12°C (53°F) | 0°C (32°F) | 0.96" |
| 1994 | 9°C (49°F) | 2°C (36°F) | 0" |
| 1993 | 21°C (70°F) | 7°C (44°F) | 0.05" |
| 1992 | 3°C (38°F) | -3°C (27°F) | 0.06" |
| 1991 | 16°C (60°F) | 6°C (43°F) | 0.34" |
| 1990 | 13°C (56°F) | 6°C (43°F) | 0" |
| 1989 | 13°C (56°F) | 1°C (34°F) | 0" |
| 1988 | 24°C (76°F) | 2°C (36°F) | 0" |
| 1987 | 8°C (46°F) | 3°C (37°F) | 0" |
| 1986 | 11°C (52°F) | 4°C (40°F) | 0.02" |
| 1985 | 27°C (81°F) | 9°C (49°F) | 0" |
| 1984 | 13°C (55°F) | 3°C (37°F) | 0" |
| 1983 | 17°C (63°F) | 6°C (42°F) | 0" |
| 1982 | 20°C (68°F) | 6°C (42°F) | 0" |
| 1981 | 16°C (61°F) | 11°C (51°F) | 0.88" |
| 1980 | 27°C (81°F) | 8°C (46°F) | 0" |
| 1979 | 16°C (61°F) | 7°C (45°F) | 0" |
| 1978 | 24°C (75°F) | 6°C (42°F) | 0" |
| 1977 | 19°C (66°F) | 7°C (44°F) | 0" |
| 1976 | 16°C (61°F) | 4°C (40°F) | 0" |
| 1975 | 17°C (62°F) | 0°C (32°F) | 0" |
| 1974 | 14°C (58°F) | 3°C (37°F) | 0" |
| 1973 | 17°C (62°F) | 2°C (35°F) | 0" |
| 1972 | 21°C (70°F) | 6°C (42°F) | 0" |
| 1971 | 15°C (59°F) | 5°C (41°F) | -- |