Weather · Montreal, Canada
Montreal Weather in September
September in Montreal averages 20°C by day and 12°C at night, with about 87mm of rain. That makes it one of the best months to visit.
Avg high
20°C
68°F
Avg low
12°C
54°F
Rainfall
87mm
#7 wettest of 12
What to pack
Layers, plus a jacket for mornings and nights. Bring a compact umbrella for the odd shower.
Timing a trip around the weather? A Local Friend in Montreal builds it around the season for you.