Montreal Weather in October
In October, Montreal averages a high of 13°C (55°F) and a low of 6°C (43°F), from 54 years of daily records (1971–2026).
13°C
Average high
55°F
6°C
Average low
43°F
30°C
Record high
86°F · October 4, 2023
-7°C
Record low
20°F · October 11, 1993
What October Is Like in Montreal
- 8 of the 10 warmest Octobers on record in Montreal have come since 2011.
- October in Montreal has become 1.9°C (3.5°F) warmer on average: the 2011–2025 average against 1970–1989.
- October 2025 was the 5th warmest October in 54 years of records, 2.7°C (4.9°F) above the long-run average.
- The coldest October reading, -7°C (20°F) on October 11, 1993, has not been matched in 33 years.
At least 1 mm of rain falls on 34% of October days, and the month averages 102 mm in total.
Warmest: 2017 (18.3°C)Latest: 2025 (16.1°C)10-year averageLong-run average (12.9°C)
Look Up a Day in October
See the weather in Montreal on any October date, year by year.
Source: NOAA GHCN-Daily, Mctavish (1994–2026); Montreal Mcgill (1971–1993); Montreal/St-Hubert A (1979–2009). Averages cover 1971–2026. How we compute this