Weather in London, Ontario, Canada in August
In an average August, London sees a daily high around 27°C and a low around 16°C, based on 1981–2026 of local climate records.
| Average high | 27°C |
|---|---|
| Typical high range | 23°C to 31°C |
| Average low | 16°C |
| Typical low range | 12°C to 20°C |
| Average daily precipitation | 3 mm |
August records
The most extreme August on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total August accumulation.
High
Highest
37°C
2001-08-08
Lowest
15°C
1986-08-28
Low
Highest
25°C
2006-08-02
Lowest
5°C
1982-08-28
Feels-like
Highest
49°C
2006-08-01
Lowest
0°C
1982-08-28
Humidity
Highest
22.5 g/m³
2016-08-13
Lowest
5.8 g/m³
1982-08-28
Wind
Highest
48 km/h
2016-08-16
Lowest
5 km/h
2020-08-12
Precip
Wettest
125 mm
1985
Driest
16 mm
2002
See London's live weather grade →
Visiting London in August? See how its comfort stacks up against where you live.
Compare London with your city →