Weather in Ottawa in August
In an average August, Ottawa sees a daily high around 25°C and a low around 15°C, based on 1980–2026 of local climate records.
| Average high | 25°C |
|---|---|
| Typical high range | 21°C to 29°C |
| Average low | 15°C |
| Typical low range | 10°C to 19°C |
| Average daily precipitation | 3 mm |
August records
The most extreme August on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total August accumulation.
High
Highest
37°C
2006-08-01
Lowest
13°C
1986-08-28
Low
Highest
25°C
2001-08-07
Lowest
4°C
1986-08-29
Feels-like
Highest
64°C
2006-08-01
Lowest
0°C
1986-08-29
Humidity
Highest
23.9 g/m³
2006-08-01
Lowest
5.7 g/m³
1982-08-28
Wind
Highest
32 km/h
1986-08-24
Lowest
5 km/h
1981-08-20
Gust
Highest
72 km/h
1994-08-28
Lowest
13 km/h
1981-08-19
Precip
Wettest
191 mm
2024
Driest
58 mm
2021
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