Toronto Weather in August
In August, Toronto averages a high of 26°C (78°F) and a low of 18°C (64°F), from 54 years of daily records (1971–2025).
26°C
Average high
78°F
18°C
Average low
64°F
37°C
Record high
98°F · August 8, 2001
5°C
Record low
42°F · August 29, 1982
What August Is Like in Toronto
- 5 of the 10 warmest Augusts on record in Toronto have come since 2010.
- The coldest August reading, 5°C (42°F) on August 29, 1982, has not been matched in 43 years.
- August in Toronto has become 0.9°C (1.6°F) warmer on average: the 2010–2024 average against 1970–1989.
- A typical August brings 3 days above 30°C (86°F).
At least 1 mm of rain falls on 24% of August days, and the month averages 73 mm in total.
Warmest: 2016 (29.1°C)Latest: 2024 (26.1°C)10-year averageLong-run average (25.8°C)
Look Up a Day in August
See the weather in Toronto on any August date, year by year.
Source: NOAA GHCN-Daily, Toronto (1971–2003); Toronto City (2002–2025). Averages cover 1971–2025. How we compute this