Weather on September 23 in Montreal
Historical weather data for September 23 in Montreal, Canada
Based on 52 years of data from MONTREAL MCGILL
About This Date
September 23rd in Montreal, Canada typically brings mild fall weather, with average highs around 18°C and lows near 11°C. Over 52 years of records, the warmest September 23rd was in 2021 (24°C average), while the coldest was 1974 (7°C) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 48% of September 23rd dates historically, with the wettest September 23rd recording 3.31" of rain. The last decade has been 6.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.3°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Montreal? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 21°C (70°F) | 16°C (61°F) | -- |
| 2023 | 22°C (71°F) | 12°C (54°F) | 0 mm |
| 2022 | 14°C (57°F) | 6°C (42°F) | 0 mm |
| 2021 | 29°C (85°F) | 20°C (68°F) | 11 mm |
| 2020 | 23°C (74°F) | 13°C (55°F) | 0 mm |
| 2019 | 26°C (78°F) | 16°C (61°F) | 9 mm |
| 2018 | 17°C (63°F) | 8°C (46°F) | 0 mm |
| 2017 | 29°C (84°F) | 17°C (63°F) | 0 mm |
| 2016 | 18°C (64°F) | 11°C (51°F) | 4 mm |
| 2015 | 24°C (75°F) | 14°C (58°F) | 0 mm |
| 2014 | 17°C (63°F) | 8°C (46°F) | 2 mm |
| 2013 | 13°C (55°F) | 6°C (43°F) | 0 mm |
| 2012 | 16°C (60°F) | 7°C (45°F) | 0 mm |
| 2011 | 23°C (73°F) | 14°C (58°F) | 0 mm |
| 2010 | 14°C (58°F) | 9°C (49°F) | 0 mm |
| 2009 | 22°C (72°F) | 13°C (56°F) | 12 mm |
| 2008 | 17°C (62°F) | 7°C (44°F) | 0 mm |
| 2007 | 22°C (71°F) | 13°C (55°F) | 0 mm |
| 2006 | 17°C (62°F) | 13°C (55°F) | 18 mm |
| 2005 | 20°C (68°F) | 11°C (51°F) | 5 mm |
| 2004 | 22°C (72°F) | 14°C (57°F) | 0 mm |
| 2003 | 18°C (64°F) | 13°C (56°F) | 84 mm |
| 2002 | 19°C (66°F) | 12°C (53°F) | 10 mm |
| 2001 | 23°C (74°F) | 16°C (60°F) | 0 mm |
| 2000 | 14°C (58°F) | 11°C (51°F) | 23 mm |
| 1999 | 19°C (67°F) | 7°C (44°F) | -- |
| 1998 | 14°C (57°F) | 6°C (43°F) | 3 mm |
| 1997 | 14°C (58°F) | 6°C (42°F) | 18 mm |
| 1996 | 13°C (56°F) | 7°C (45°F) | 0 mm |
| 1994 | 16°C (61°F) | 13°C (56°F) | 0 mm |
| 1992 | 10°C (50°F) | 6°C (43°F) | 0 mm |
| 1991 | 16°C (61°F) | 9°C (49°F) | 4 mm |
| 1990 | 16°C (60°F) | 12°C (53°F) | 13 mm |
| 1989 | 23°C (73°F) | 15°C (59°F) | 1 mm |
| 1988 | 20°C (68°F) | 13°C (55°F) | 3 mm |
| 1987 | 18°C (65°F) | 12°C (53°F) | 6 mm |
| 1986 | 14°C (58°F) | 9°C (49°F) | 26 mm |
| 1985 | 25°C (77°F) | 14°C (57°F) | 1 mm |
| 1984 | 24°C (76°F) | 13°C (55°F) | 0 mm |
| 1983 | 15°C (59°F) | -- | 3 mm |
| 1982 | 17°C (63°F) | 12°C (53°F) | 29 mm |
| 1981 | 9°C (49°F) | 8°C (47°F) | 27 mm |
| 1980 | 18°C (65°F) | 12°C (53°F) | 0 mm |
| 1979 | 13°C (56°F) | 6°C (42°F) | 0 mm |
| 1978 | 16°C (61°F) | 7°C (44°F) | 0 mm |
| 1977 | 16°C (61°F) | 8°C (46°F) | 0 mm |
| 1976 | 14°C (57°F) | 8°C (46°F) | 15 mm |
| 1975 | 18°C (64°F) | 13°C (55°F) | 6 mm |
| 1974 | 9°C (49°F) | 4°C (40°F) | 0 mm |
| 1973 | 12°C (53°F) | 8°C (47°F) | 0 mm |
| 1972 | 16°C (60°F) | 7°C (44°F) | 0 mm |
| 1971 | 21°C (69°F) | 10°C (50°F) | 5 mm |