Weather in London, Ontario, Canada in September
In an average September, London sees a daily high around 23°C and a low around 12°C, based on 1981–2026 of local climate records.
| Average high | 23°C |
|---|---|
| Typical high range | 18°C to 28°C |
| Average low | 12°C |
| Typical low range | 7°C to 17°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
35°C
2002-09-08
Lowest
10°C
1990-09-23
Low
Highest
23°C
2016-09-07
Lowest
-1°C
1993-09-30
Feels-like
Highest
49°C
2011-09-02
Lowest
-5°C
1993-09-30
Humidity
Highest
20.3 g/m³
1985-09-07
Lowest
4.6 g/m³
1993-09-30
Wind
Highest
52 km/h
2010-09-24
Lowest
8 km/h
1996-09-01
Precip
Wettest
190 mm
1986
Driest
20 mm
2023
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