Weather in Longueuil in September
In an average September, Longueuil sees a daily high around 21°C and a low around 11°C, based on 1980–2026 of local climate records.
| Average high | 21°C |
|---|---|
| Typical high range | 16°C to 26°C |
| Average low | 11°C |
| Typical low range | 5°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
33°C
1999-09-04
Lowest
8°C
1992-09-30
Low
Highest
22°C
1989-09-10
Lowest
-3°C
1980-09-29
Feels-like
Highest
43°C
2023-09-06
Lowest
-9°C
1980-09-29
Humidity
Highest
20.7 g/m³
2018-09-03
Lowest
3.8 g/m³
1992-09-30
Wind
Highest
45 km/h
1989-09-23
Lowest
5 km/h
2018-09-13
Gust
Highest
103 km/h
1989-09-23
Lowest
13 km/h
2025-09-01
Precip
Wettest
196 mm
1999
Driest
40 mm
2017
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