Weather in Mississauga in September
In an average September, Mississauga sees a daily high around 22°C and a low around 12°C, based on 1980–2026 of local climate records.
| Average high | 22°C |
|---|---|
| Typical high range | 16°C to 27°C |
| Average low | 12°C |
| Typical low range | 6°C to 18°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
34°C
2013-09-10
Lowest
9°C
1991-09-27
Low
Highest
23°C
1983-09-10
Lowest
-1°C
1993-09-30
Feels-like
Highest
48°C
2013-09-10
Lowest
-6°C
1989-09-27
Humidity
Highest
20.3 g/m³
1985-09-07
Lowest
4.3 g/m³
1993-09-30
Wind
Highest
37 km/h
2025-09-05
Lowest
6 km/h
2014-09-26
Gust
Highest
91 km/h
2018-09-21
Lowest
13 km/h
2014-09-28
Precip
Wettest
183 mm
1986
Driest
20 mm
2023
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