Weather in Montréal in September
In an average September, Montréal sees a daily high around 20°C and a low around 13°C, based on 1980–2026 of local climate records.
| Average high | 20°C |
|---|---|
| Typical high range | 15°C to 26°C |
| Average low | 13°C |
| Typical low range | 8°C to 17°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
32°C
2002-09-09
Lowest
7°C
1992-09-30
Low
Highest
22°C
2010-09-02
Lowest
0°C
1980-09-29
Feels-like
Highest
35°C
2023-09-05
Lowest
-4°C
1980-09-29
Humidity
Highest
21.3 g/m³
2018-09-03
Lowest
3.3 g/m³
1992-09-30
Wind
Highest
46 km/h
2006-09-24
Lowest
6 km/h
2025-09-23
Gust
Highest
101 km/h
1989-09-23
Lowest
13 km/h
2018-09-13
Precip
Wettest
189 mm
1999
Driest
37 mm
2017
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