Weather on September 18 in Montreal
Historical weather data for September 18 in Montreal, Canada
Based on 52 years of data from MONTREAL MCGILL
About This Date
September 18th in Montreal, Canada typically brings mild fall weather, with average highs around 20°C and lows near 11°C. Over 52 years of records, the warmest September 18th was in 1992 (24°C average), while the coldest was 1974 (9°C) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 18th dates historically, with the wettest September 18th recording 2.88" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Montreal? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 26°C (78°F) | 16°C (60°F) | -- |
| 2023 | 18°C (65°F) | 15°C (59°F) | 3 mm |
| 2022 | 17°C (62°F) | 12°C (53°F) | 59 mm |
| 2021 | 23°C (74°F) | 14°C (57°F) | 0 mm |
| 2020 | 14°C (57°F) | 6°C (42°F) | 0 mm |
| 2019 | 18°C (65°F) | 10°C (50°F) | 0 mm |
| 2018 | 26°C (79°F) | 11°C (51°F) | 0 mm |
| 2017 | 26°C (79°F) | 17°C (62°F) | 0 mm |
| 2016 | 27°C (80°F) | 19°C (67°F) | 2 mm |
| 2015 | 28°C (83°F) | 18°C (64°F) | 0 mm |
| 2014 | 14°C (57°F) | 5°C (41°F) | 0 mm |
| 2013 | 21°C (69°F) | 10°C (50°F) | 0 mm |
| 2012 | 21°C (69°F) | 12°C (53°F) | 73 mm |
| 2011 | 19°C (67°F) | 8°C (46°F) | 0 mm |
| 2010 | 21°C (69°F) | 9°C (49°F) | 3 mm |
| 2009 | 17°C (62°F) | 8°C (47°F) | 4 mm |
| 2008 | 14°C (58°F) | 7°C (44°F) | 0 mm |
| 2007 | 21°C (69°F) | 8°C (47°F) | 0 mm |
| 2006 | 27°C (80°F) | 16°C (61°F) | 0 mm |
| 2005 | 21°C (69°F) | 14°C (57°F) | 0 mm |
| 2004 | 17°C (62°F) | 8°C (47°F) | 0 mm |
| 2003 | 24°C (76°F) | 12°C (54°F) | 0 mm |
| 2002 | 22°C (71°F) | 10°C (50°F) | 0 mm |
| 2001 | 19°C (67°F) | 16°C (60°F) | 0 mm |
| 2000 | 19°C (67°F) | 11°C (51°F) | 0 mm |
| 1999 | 19°C (67°F) | 10°C (50°F) | 0 mm |
| 1998 | 21°C (70°F) | 9°C (48°F) | 0 mm |
| 1997 | 23°C (73°F) | 16°C (60°F) | 0 mm |
| 1996 | 23°C (74°F) | 13°C (55°F) | 0 mm |
| 1994 | 16°C (60°F) | 8°C (46°F) | 0 mm |
| 1992 | 28°C (83°F) | 20°C (68°F) | 3 mm |
| 1991 | 24°C (75°F) | 13°C (55°F) | 18 mm |
| 1990 | 13°C (55°F) | 6°C (42°F) | 0 mm |
| 1989 | 23°C (73°F) | 11°C (51°F) | 0 mm |
| 1988 | 22°C (72°F) | 13°C (56°F) | 0 mm |
| 1987 | 20°C (68°F) | 8°C (47°F) | 0 mm |
| 1986 | 17°C (62°F) | 8°C (46°F) | 0 mm |
| 1985 | 24°C (76°F) | 13°C (56°F) | 0 mm |
| 1984 | 22°C (72°F) | 9°C (49°F) | 0 mm |
| 1983 | 20°C (68°F) | 13°C (55°F) | 22 mm |
| 1982 | 16°C (61°F) | 9°C (48°F) | 11 mm |
| 1981 | 17°C (62°F) | 12°C (54°F) | 0 mm |
| 1980 | 13°C (55°F) | 8°C (46°F) | 0 mm |
| 1979 | 24°C (75°F) | 15°C (59°F) | 26 mm |
| 1978 | 14°C (58°F) | 6°C (42°F) | 0 mm |
| 1977 | 21°C (69°F) | 16°C (60°F) | 0 mm |
| 1976 | 24°C (75°F) | 18°C (65°F) | 2 mm |
| 1975 | 20°C (68°F) | 10°C (50°F) | 10 mm |
| 1974 | 13°C (56°F) | 4°C (40°F) | 0 mm |
| 1973 | 13°C (55°F) | 8°C (47°F) | 10 mm |
| 1972 | 23°C (73°F) | 13°C (55°F) | 49 mm |
| 1971 | 21°C (70°F) | 13°C (55°F) | 0 mm |