Weather on September 20 in Calgary
Historical weather data for September 20 in Calgary, Canada
Avg High16°C (61°F)
Avg Low3°C (38°F)
Warmest202518°C
Coldest19952°C
Based on 53 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 53 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 28% of recorded September 20th dates, with snow falling 4% of the time. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for September 20th in Calgary? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 28°C (82°F) | 7°C (45°F) | -- |
| 2023 | 9°C (48°F) | 4°C (40°F) | 0.03" |
| 2022 | 14°C (57°F) | 1°C (33°F) | 0" |
| 2021 | 18°C (64°F) | 1°C (34°F) | 0" |
| 2020 | 20°C (68°F) | 8°C (46°F) | 0" |
| 2019 | 16°C (60°F) | 7°C (44°F) | 0" |
| 2018 | 9°C (49°F) | 1°C (33°F) | 0" |
| 2017 | 9°C (48°F) | 1°C (33°F) | 0.04" |
| 2016 | 7°C (44°F) | 4°C (39°F) | 0.1" |
| 2015 | 20°C (68°F) | 7°C (44°F) | 0.22" |
| 2014 | 21°C (69°F) | 6°C (42°F) | 0" |
| 2013 | 22°C (72°F) | 4°C (40°F) | 0" |
| 2012 | 26°C (79°F) | 6°C (43°F) | 0" |
| 2011 | 17°C (63°F) | 2°C (36°F) | 0" |
| 2010 | 6°C (42°F) | 2°C (35°F) | 0.08" |
| 2009 | 16°C (61°F) | 4°C (40°F) | 0.16" |
| 2008 | 24°C (75°F) | 5°C (41°F) | 0" |
| 2007 | 14°C (57°F) | 1°C (33°F) | 0.46" |
| 2006 | 16°C (60°F) | 6°C (43°F) | 0" |
| 2005 | 14°C (58°F) | 3°C (38°F) | 0" |
| 2004 | 7°C (44°F) | 1°C (34°F) | 0.16" |
| 2003 | 17°C (62°F) | 5°C (41°F) | 0" |
| 2002 | 13°C (55°F) | 1°C (33°F) | 0.02" |
| 2001 | 16°C (61°F) | 3°C (37°F) | 0" |
| 2000 | 11°C (51°F) | 1°C (33°F) | 0.24" |
| 1999 | 28°C (82°F) | -- | -- |
| 1998 | 14°C (58°F) | 5°C (41°F) | 0.23" |
| 1997 | 24°C (75°F) | 3°C (38°F) | 0" |
| 1996 | 11°C (52°F) | 2°C (35°F) | 0.22" |
| 1995 | 6°C (43°F) | -3°C (26°F) | 0.02" |
| 1994 | 14°C (57°F) | 1°C (33°F) | 0" |
| 1992 | 23°C (73°F) | 6°C (42°F) | 0" |
| 1991 | 14°C (57°F) | 6°C (42°F) | 0" |
| 1990 | 18°C (65°F) | 6°C (42°F) | 0" |
| 1989 | 18°C (64°F) | 1°C (33°F) | 0" |
| 1988 | 8°C (46°F) | 1°C (34°F) | 0" |
| 1987 | 28°C (82°F) | 6°C (43°F) | 0" |
| 1986 | 8°C (47°F) | 3°C (38°F) | 0.16" |
| 1985 | 17°C (62°F) | -1°C (31°F) | 0" |
| 1984 | 8°C (46°F) | 4°C (39°F) | 1.62" |
| 1983 | 14°C (58°F) | -3°C (27°F) | 0" |
| 1982 | 21°C (69°F) | 0°C (32°F) | 0" |
| 1981 | 15°C (59°F) | 6°C (43°F) | 0" |
| 1980 | 17°C (62°F) | 7°C (44°F) | 0" |
| 1979 | 18°C (65°F) | 4°C (40°F) | 0" |
| 1978 | 18°C (65°F) | -1°C (30°F) | 0" |
| 1977 | 19°C (67°F) | 9°C (48°F) | 0" |
| 1976 | 25°C (77°F) | 6°C (43°F) | 0" |
| 1975 | 21°C (70°F) | 1°C (34°F) | 0" |
| 1974 | 17°C (63°F) | 3°C (38°F) | 0" |
| 1973 | 14°C (57°F) | 8°C (46°F) | 0" |
| 1972 | 7°C (45°F) | 1°C (34°F) | 0" |
| 1971 | 8°C (47°F) | 0°C (32°F) | 0" |