Weather on August 12 in Montreal
Historical weather data for August 12 in Montreal, Canada
Based on 51 years of data from MCTAVISH
About This Date
August 12th in Montreal, Canada typically brings pleasant summer weather, with average highs around 26°C and lows near 17°C. Over 51 years of records, the warmest August 12th was in 2025 (28°C average), while the coldest was 1979 (16°C) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 35% of August 12th dates historically, with the wettest August 12th recording 1.13" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for August 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 | 34°C (94°F) | 23°C (73°F) | -- |
| 2023 | 25°C (77°F) | 16°C (61°F) | 29 mm |
| 2022 | 20°C (68°F) | 15°C (59°F) | 0 mm |
| 2021 | 31°C (87°F) | 23°C (74°F) | 0 mm |
| 2020 | 29°C (84°F) | 21°C (69°F) | 0 mm |
| 2019 | 27°C (81°F) | 18°C (64°F) | 5 mm |
| 2018 | 29°C (85°F) | 18°C (65°F) | 2 mm |
| 2017 | 27°C (80°F) | 17°C (63°F) | 28 mm |
| 2016 | 27°C (81°F) | 18°C (65°F) | 5 mm |
| 2015 | 23°C (74°F) | 17°C (62°F) | 4 mm |
| 2014 | 29°C (84°F) | 19°C (66°F) | 19 mm |
| 2013 | 26°C (78°F) | 17°C (62°F) | 0 mm |
| 2012 | 27°C (81°F) | 19°C (67°F) | 0 mm |
| 2011 | 26°C (78°F) | 16°C (60°F) | 0 mm |
| 2010 | 25°C (77°F) | 16°C (60°F) | 0 mm |
| 2009 | 28°C (83°F) | 18°C (65°F) | 0 mm |
| 2008 | 23°C (74°F) | 16°C (61°F) | 9 mm |
| 2007 | 29°C (85°F) | 21°C (69°F) | 0 mm |
| 2006 | 21°C (69°F) | 12°C (54°F) | 0 mm |
| 2005 | 27°C (81°F) | 18°C (65°F) | 5 mm |
| 2004 | 22°C (72°F) | 17°C (62°F) | 14 mm |
| 2003 | 27°C (81°F) | 19°C (66°F) | 0 mm |
| 2002 | 33°C (91°F) | 22°C (71°F) | 0 mm |
| 2001 | 30°C (86°F) | 18°C (64°F) | 0 mm |
| 2000 | 26°C (78°F) | 16°C (61°F) | 3 mm |
| 1999 | 27°C (81°F) | 18°C (64°F) | 0 mm |
| 1998 | 22°C (71°F) | 15°C (59°F) | 0 mm |
| 1997 | 23°C (73°F) | 12°C (53°F) | 0 mm |
| 1994 | 25°C (77°F) | 15°C (59°F) | 0 mm |
| 1992 | 19°C (66°F) | 13°C (55°F) | 0 mm |
| 1991 | 28°C (82°F) | 17°C (62°F) | 0 mm |
| 1990 | 26°C (79°F) | 20°C (68°F) | 8 mm |
| 1989 | 25°C (77°F) | 18°C (64°F) | 4 mm |
| 1988 | 31°C (87°F) | 22°C (72°F) | 7 mm |
| 1987 | 25°C (77°F) | 15°C (59°F) | 0 mm |
| 1986 | 22°C (71°F) | 14°C (57°F) | 0 mm |
| 1985 | 24°C (75°F) | 13°C (56°F) | 0 mm |
| 1984 | 28°C (83°F) | 19°C (66°F) | 1 mm |
| 1983 | 22°C (71°F) | 16°C (60°F) | 0 mm |
| 1982 | 21°C (70°F) | 15°C (59°F) | 1 mm |
| 1981 | 24°C (76°F) | 18°C (65°F) | 0 mm |
| 1980 | 23°C (73°F) | 18°C (64°F) | 6 mm |
| 1979 | 18°C (65°F) | 13°C (55°F) | 0 mm |
| 1978 | 24°C (75°F) | 18°C (64°F) | 0 mm |
| 1977 | 24°C (76°F) | 18°C (65°F) | 0 mm |
| 1976 | 29°C (84°F) | 19°C (67°F) | 0 mm |
| 1975 | 29°C (85°F) | 19°C (67°F) | 0 mm |
| 1974 | 27°C (81°F) | 17°C (62°F) | 0 mm |
| 1973 | 26°C (79°F) | 19°C (67°F) | 0 mm |
| 1972 | 21°C (69°F) | 17°C (62°F) | 0 mm |
| 1971 | 22°C (71°F) | 13°C (55°F) | 1 mm |