Weather on September 18 in Calgary
Historical weather data for September 18 in Calgary, Canada
Avg High17°C (62°F)
Avg Low4°C (40°F)
Warmest198121°C
Coldest19853°C
Based on 54 years of data from CALGARY GLENMORE DAM
About This Date
September 18th in Calgary, Canada typically brings mild fall weather, with average highs around 17°C and lows near 4°C. Over 54 years of records, the warmest September 18th was in 1981 (21°C average), while the coldest was 1985 (3°C) — a 32°F range across recorded history. Precipitation has occurred on 26% of recorded September 18th dates, with snow falling 6% of the time (heaviest snowfall: 4.8"). The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Calgary? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 25°C (77°F) | 7°C (45°F) | -- |
| 2023 | 21°C (69°F) | 9°C (48°F) | 0.18" |
| 2022 | 18°C (65°F) | 2°C (35°F) | 0" |
| 2021 | 23°C (74°F) | 12°C (53°F) | 0" |
| 2020 | 20°C (68°F) | 7°C (44°F) | 0" |
| 2019 | 17°C (62°F) | 3°C (38°F) | 0.08" |
| 2018 | 7°C (44°F) | 3°C (37°F) | 0.04" |
| 2017 | 18°C (64°F) | 4°C (40°F) | 0" |
| 2016 | 18°C (64°F) | 3°C (38°F) | 0.02" |
| 2015 | 18°C (65°F) | 4°C (39°F) | 0" |
| 2014 | 21°C (70°F) | 12°C (53°F) | 0" |
| 2013 | 11°C (52°F) | 6°C (42°F) | 1.25" |
| 2012 | 27°C (81°F) | 7°C (45°F) | 0" |
| 2011 | 20°C (68°F) | 3°C (37°F) | 0" |
| 2010 | 6°C (42°F) | 0°C (32°F) | 0" |
| 2009 | 24°C (75°F) | 6°C (42°F) | 0" |
| 2008 | 24°C (75°F) | 8°C (47°F) | 0" |
| 2007 | 12°C (54°F) | 2°C (36°F) | 0" |
| 2006 | 14°C (58°F) | -2°C (29°F) | 0" |
| 2005 | 19°C (67°F) | 3°C (37°F) | 0" |
| 2004 | 12°C (53°F) | 5°C (41°F) | 0" |
| 2003 | 16°C (61°F) | -2°C (29°F) | 0" |
| 2002 | 18°C (65°F) | 4°C (39°F) | 0" |
| 2001 | 24°C (75°F) | 8°C (46°F) | 0" |
| 2000 | 20°C (68°F) | 8°C (47°F) | 0.9" |
| 1999 | 16°C (61°F) | 6°C (42°F) | 0" |
| 1998 | 14°C (58°F) | 7°C (45°F) | 0.78" |
| 1997 | 7°C (44°F) | 6°C (42°F) | 0.34" |
| 1996 | 10°C (50°F) | 4°C (40°F) | 0.46" |
| 1995 | 6°C (42°F) | -1°C (31°F) | 0.48" |
| 1994 | 23°C (73°F) | 11°C (51°F) | 0" |
| 1993 | 19°C (67°F) | 1°C (34°F) | 0" |
| 1992 | 21°C (69°F) | -2°C (28°F) | 0" |
| 1991 | 17°C (63°F) | -1°C (31°F) | 0" |
| 1990 | 22°C (72°F) | 1°C (34°F) | 0" |
| 1989 | 12°C (53°F) | 3°C (37°F) | 0" |
| 1988 | 12°C (53°F) | -2°C (28°F) | 0.08" |
| 1987 | 20°C (68°F) | 5°C (41°F) | 0" |
| 1986 | 8°C (46°F) | 3°C (37°F) | 0.1" |
| 1985 | 6°C (42°F) | 0°C (32°F) | 1.22" |
| 1984 | 26°C (78°F) | 8°C (46°F) | 0" |
| 1983 | 8°C (46°F) | 1°C (33°F) | 0.1" |
| 1982 | 21°C (69°F) | 10°C (50°F) | 0" |
| 1981 | 32°C (89°F) | 9°C (49°F) | 0" |
| 1980 | 9°C (49°F) | 3°C (37°F) | 0" |
| 1979 | 27°C (80°F) | 5°C (41°F) | 0" |
| 1978 | 9°C (48°F) | 2°C (36°F) | 0" |
| 1977 | 17°C (63°F) | 1°C (33°F) | 0" |
| 1976 | 15°C (59°F) | 9°C (48°F) | 0" |
| 1975 | 13°C (56°F) | 3°C (38°F) | 0" |
| 1974 | 11°C (52°F) | 6°C (42°F) | 0" |
| 1973 | 16°C (61°F) | 3°C (38°F) | 0" |
| 1972 | 9°C (48°F) | 3°C (37°F) | 0" |
| 1971 | 19°C (67°F) | 2°C (35°F) | 0" |