Montreal Weather in September
In September, Montreal averages a high of 21°C (69°F) and a low of 12°C (54°F), based on 52 years of historical weather data from MONTREAL MCGILL.
21°C
Average high
69°F
12°C
Average low
54°F
33°C
Record high
92°F · 2008
1°C
Record low
33°F · 1980
What to Expect in Montreal in September
Typical September days in Montreal reach 21°C (69°F) during the afternoon and cool to around 12°C (54°F) overnight. On average, measurable rain falls on about 39% of days this month. Over the past 52 years, September temperatures in Montreal have ranged from a record high of 33°C (2008) down to a record low of 1°C (1980).
For a day-by-day look or other months, see the full Montreal weather history.