Weather on August 18 in Montreal
Historical weather data for August 18 in Montreal, Canada
Based on 51 years of data from MONTREAL MCGILL
About This Date
August 18th in Montreal, Canada typically brings pleasant summer weather, with average highs around 25°C and lows near 17°C. Over 51 years of records, the warmest August 18th was in 2002 (26°C average), while the coldest was 2007 (15°C) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 25% of August 18th dates historically, with the wettest August 18th recording 2" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Montreal? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 21°C (70°F) | 12°C (53°F) | -- |
| 2023 | 24°C (76°F) | 17°C (62°F) | 0.65" |
| 2022 | 23°C (73°F) | 17°C (63°F) | 0.09" |
| 2021 | 31°C (87°F) | 21°C (70°F) | 0" |
| 2020 | 24°C (76°F) | 16°C (61°F) | 0.21" |
| 2019 | 27°C (81°F) | 21°C (69°F) | 0" |
| 2018 | 25°C (77°F) | 17°C (63°F) | 0" |
| 2017 | 21°C (70°F) | 16°C (61°F) | 1.89" |
| 2016 | 28°C (82°F) | 20°C (68°F) | 0" |
| 2015 | 31°C (88°F) | 21°C (70°F) | 1.97" |
| 2014 | 22°C (72°F) | 13°C (55°F) | 0" |
| 2013 | 27°C (80°F) | 16°C (61°F) | 0" |
| 2012 | 22°C (72°F) | 15°C (59°F) | 0" |
| 2011 | 28°C (83°F) | 19°C (66°F) | 0" |
| 2010 | 23°C (73°F) | 16°C (61°F) | 0" |
| 2009 | 30°C (86°F) | 23°C (73°F) | 0" |
| 2008 | 29°C (85°F) | 16°C (61°F) | 1.55" |
| 2007 | 18°C (64°F) | 12°C (53°F) | 0" |
| 2006 | 29°C (84°F) | 18°C (64°F) | 0" |
| 2005 | 20°C (68°F) | 12°C (54°F) | 0" |
| 2004 | 27°C (80°F) | 18°C (65°F) | 0" |
| 2003 | 27°C (80°F) | 17°C (62°F) | 0" |
| 2002 | 32°C (89°F) | 21°C (69°F) | 0" |
| 2001 | 27°C (80°F) | 19°C (67°F) | 0" |
| 2000 | 22°C (72°F) | 13°C (55°F) | 0" |
| 1999 | 24°C (76°F) | 18°C (64°F) | 0" |
| 1998 | 24°C (75°F) | 12°C (54°F) | 0" |
| 1997 | 22°C (72°F) | 14°C (57°F) | 0" |
| 1994 | 23°C (73°F) | 15°C (59°F) | 0" |
| 1992 | 23°C (74°F) | 18°C (64°F) | 0.14" |
| 1991 | 24°C (75°F) | 21°C (69°F) | 0.02" |
| 1990 | 28°C (83°F) | 16°C (60°F) | 2" |
| 1989 | 24°C (75°F) | 14°C (58°F) | 0" |
| 1988 | 21°C (69°F) | 13°C (56°F) | 0" |
| 1987 | 28°C (82°F) | 21°C (70°F) | 0" |
| 1986 | 26°C (79°F) | 20°C (68°F) | 0" |
| 1985 | 28°C (82°F) | 13°C (55°F) | 0" |
| 1984 | 23°C (74°F) | 12°C (54°F) | 0" |
| 1983 | 27°C (80°F) | 19°C (67°F) | 0" |
| 1982 | 23°C (74°F) | 14°C (57°F) | 0" |
| 1981 | 24°C (76°F) | 14°C (58°F) | 0" |
| 1980 | 26°C (79°F) | 16°C (60°F) | 0.03" |
| 1979 | 21°C (70°F) | 13°C (56°F) | 0.74" |
| 1978 | 25°C (77°F) | 17°C (62°F) | 0" |
| 1977 | 18°C (64°F) | 13°C (56°F) | 0" |
| 1976 | 24°C (76°F) | 14°C (58°F) | 0" |
| 1975 | 25°C (77°F) | 17°C (62°F) | 0" |
| 1974 | 26°C (79°F) | 18°C (64°F) | 0" |
| 1973 | 31°C (87°F) | 21°C (69°F) | 0.43" |
| 1972 | 21°C (69°F) | 17°C (62°F) | 0.81" |
| 1971 | 27°C (81°F) | 19°C (66°F) | 0" |