Weather on September 20 in Calgary
Historical weather data for September 20 in Calgary, Canada
Based on 54 years of data from CALGARY GLENMORE DAM
About This Date
September 20th in Calgary, Canada typically brings mild fall weather, with average highs around 16°C and lows near 3°C. Over 54 years of records, the warmest September 20th was in 2025 (18°C average), while the coldest was 1995 (2°C) — a 29°F range across recorded history. Precipitation has occurred on 31% of recorded September 20th dates, with snow falling 4% of the time. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for September 20th in Calgary? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2026 | 24°C (76°F) | 5°C (41°F) | -- |
| 2025 | 28°C (82°F) | 7°C (45°F) | -- |
| 2023 | 9°C (48°F) | 4°C (40°F) | 0 mm |
| 2022 | 14°C (57°F) | 1°C (33°F) | 0 mm |
| 2021 | 17°C (63°F) | 0°C (32°F) | 0 mm |
| 2020 | 19°C (67°F) | 8°C (46°F) | 0 mm |
| 2019 | 16°C (60°F) | 8°C (46°F) | 0 mm |
| 2018 | 9°C (49°F) | 1°C (33°F) | 0 mm |
| 2017 | 9°C (48°F) | -1°C (31°F) | 0 mm |
| 2016 | 7°C (44°F) | 4°C (39°F) | 1 mm |
| 2015 | 20°C (68°F) | 7°C (44°F) | 2 mm |
| 2014 | 21°C (69°F) | 6°C (42°F) | 0 mm |
| 2013 | 22°C (72°F) | 4°C (40°F) | 0 mm |
| 2012 | 26°C (79°F) | 6°C (43°F) | 0 mm |
| 2011 | 17°C (63°F) | 2°C (36°F) | 0 mm |
| 2010 | 6°C (42°F) | 2°C (35°F) | 1 mm |
| 2009 | 16°C (61°F) | 4°C (40°F) | 2 mm |
| 2008 | 24°C (75°F) | 5°C (41°F) | 0 mm |
| 2007 | 14°C (57°F) | 1°C (33°F) | 5 mm |
| 2006 | 16°C (60°F) | 6°C (43°F) | 0 mm |
| 2005 | 15°C (59°F) | 4°C (39°F) | 0 mm |
| 2004 | 7°C (44°F) | 1°C (34°F) | 2 mm |
| 2003 | 16°C (60°F) | 4°C (40°F) | 0 mm |
| 2002 | 13°C (55°F) | 1°C (33°F) | 0 mm |
| 2001 | 16°C (61°F) | 3°C (37°F) | 0 mm |
| 2000 | 11°C (51°F) | 1°C (33°F) | 2 mm |
| 1999 | 28°C (82°F) | -- | -- |
| 1998 | 14°C (58°F) | 5°C (41°F) | 2 mm |
| 1997 | 24°C (75°F) | 3°C (38°F) | 0 mm |
| 1996 | 11°C (52°F) | 2°C (35°F) | 2 mm |
| 1995 | 6°C (43°F) | -3°C (26°F) | 0 mm |
| 1994 | 14°C (57°F) | 1°C (33°F) | 0 mm |
| 1992 | 23°C (73°F) | 6°C (42°F) | 0 mm |
| 1991 | 14°C (57°F) | 6°C (42°F) | 0 mm |
| 1990 | 18°C (65°F) | 6°C (42°F) | 0 mm |
| 1989 | 18°C (64°F) | 1°C (33°F) | 0 mm |
| 1988 | 8°C (46°F) | 1°C (34°F) | 0 mm |
| 1987 | 28°C (82°F) | 6°C (43°F) | 0 mm |
| 1986 | 8°C (47°F) | 3°C (38°F) | 2 mm |
| 1985 | 17°C (62°F) | -1°C (31°F) | 0 mm |
| 1984 | 8°C (46°F) | 4°C (39°F) | 16 mm |
| 1983 | 14°C (58°F) | -3°C (27°F) | 0 mm |
| 1982 | 21°C (69°F) | 0°C (32°F) | 0 mm |
| 1981 | 15°C (59°F) | 6°C (43°F) | 0 mm |
| 1980 | 17°C (62°F) | 7°C (44°F) | 0 mm |
| 1979 | 18°C (65°F) | 4°C (40°F) | 0 mm |
| 1978 | 18°C (65°F) | -1°C (30°F) | 0 mm |
| 1977 | 19°C (67°F) | 9°C (48°F) | 0 mm |
| 1976 | 25°C (77°F) | 6°C (43°F) | 0 mm |
| 1975 | 21°C (70°F) | 1°C (34°F) | 0 mm |
| 1974 | 17°C (63°F) | 3°C (38°F) | 0 mm |
| 1973 | 14°C (57°F) | 8°C (46°F) | 0 mm |
| 1972 | 7°C (45°F) | 1°C (34°F) | 0 mm |
| 1971 | 8°C (47°F) | 0°C (32°F) | 0 mm |