Weather on September 12 in Montreal
Historical weather data for September 12 in Montreal, Canada
Based on 52 years of data from MCTAVISH
About This Date
September 12th in Montreal, Canada typically brings pleasant fall weather, with average highs around 21°C and lows near 13°C. Over 52 years of records, the warmest September 12th was in 2005 (23°C average), while the coldest was 1985 (11°C) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 35% of September 12th dates historically, with the wettest September 12th recording 3.11" of rain. The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
Planning for September 12th 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 (69°F) | 11°C (51°F) | -- |
| 2023 | 22°C (71°F) | 14°C (58°F) | 0 mm |
| 2022 | 27°C (81°F) | 18°C (65°F) | 1 mm |
| 2021 | 24°C (76°F) | 16°C (61°F) | 1 mm |
| 2020 | 21°C (69°F) | 9°C (49°F) | 0 mm |
| 2019 | 19°C (67°F) | 12°C (53°F) | 0 mm |
| 2018 | 24°C (75°F) | 17°C (63°F) | 0 mm |
| 2017 | 24°C (75°F) | 14°C (57°F) | 0 mm |
| 2016 | 23°C (73°F) | 13°C (56°F) | 0 mm |
| 2015 | 19°C (67°F) | 15°C (59°F) | 33 mm |
| 2014 | 15°C (59°F) | 8°C (47°F) | 0 mm |
| 2013 | 23°C (74°F) | 17°C (63°F) | 63 mm |
| 2012 | 28°C (82°F) | 14°C (57°F) | 0 mm |
| 2011 | 26°C (78°F) | 17°C (63°F) | 43 mm |
| 2010 | 21°C (70°F) | 12°C (54°F) | 0 mm |
| 2009 | 25°C (77°F) | 12°C (54°F) | 0 mm |
| 2008 | 18°C (64°F) | 14°C (58°F) | 13 mm |
| 2007 | 19°C (66°F) | 11°C (51°F) | 6 mm |
| 2006 | 19°C (67°F) | 8°C (47°F) | 0 mm |
| 2005 | 29°C (84°F) | 18°C (65°F) | 0 mm |
| 2004 | 23°C (74°F) | 15°C (59°F) | 0 mm |
| 2003 | 27°C (80°F) | 15°C (59°F) | 0 mm |
| 2002 | 18°C (65°F) | 8°C (46°F) | 0 mm |
| 2001 | 23°C (73°F) | 13°C (55°F) | 0 mm |
| 2000 | 24°C (76°F) | 17°C (62°F) | 51 mm |
| 1999 | 23°C (73°F) | 14°C (57°F) | 0 mm |
| 1998 | 21°C (70°F) | 13°C (56°F) | 16 mm |
| 1997 | 23°C (74°F) | 17°C (63°F) | 3 mm |
| 1996 | 22°C (72°F) | 17°C (63°F) | 18 mm |
| 1994 | 21°C (69°F) | 12°C (54°F) | 3 mm |
| 1992 | 16°C (61°F) | 8°C (46°F) | 0 mm |
| 1991 | 18°C (64°F) | 9°C (49°F) | 0 mm |
| 1990 | 24°C (75°F) | 12°C (53°F) | 0 mm |
| 1989 | 23°C (74°F) | 14°C (57°F) | 0 mm |
| 1988 | 19°C (66°F) | 11°C (52°F) | 15 mm |
| 1987 | 20°C (68°F) | 17°C (62°F) | 79 mm |
| 1986 | 23°C (74°F) | 15°C (59°F) | 54 mm |
| 1985 | 13°C (56°F) | 8°C (46°F) | 0 mm |
| 1984 | 19°C (67°F) | 12°C (53°F) | 0 mm |
| 1983 | 23°C (73°F) | 16°C (60°F) | 0 mm |
| 1982 | 27°C (81°F) | 18°C (64°F) | 0 mm |
| 1981 | 22°C (71°F) | 13°C (55°F) | 0 mm |
| 1980 | 16°C (60°F) | 7°C (45°F) | 0 mm |
| 1979 | 18°C (64°F) | 10°C (50°F) | 0 mm |
| 1978 | 18°C (64°F) | 10°C (50°F) | 0 mm |
| 1977 | 16°C (60°F) | 8°C (47°F) | 18 mm |
| 1976 | 21°C (69°F) | 9°C (49°F) | 0 mm |
| 1975 | 16°C (60°F) | 13°C (56°F) | 0 mm |
| 1974 | 23°C (74°F) | 21°C (69°F) | 1 mm |
| 1973 | 18°C (65°F) | 11°C (51°F) | 0 mm |
| 1972 | 21°C (69°F) | 15°C (59°F) | 0 mm |
| 1971 | 18°C (65°F) | 16°C (61°F) | 11 mm |