Toronto weather in August
In August, Toronto has an average high of 24 °C76 °F and an average low of 18 °C65 °F, with about 59 mm2.3 in of precipitation. It is the 2nd warmest month of the year and ranks 9th for precipitation.
How August compares with other months
Compared with July, August is about the same temperature and drier by 16 mm0.6 in. Compared with September, August is 3.3 °C6 °F warmer on average and drier by 7 mm0.3 in. Daylight lasts about 14.0 hours around the middle of the month. Average relative humidity is 72% and the average cloud amount 62%.
Is August a good time to visit Toronto?
Yes — August is one of the most comfortable months to visit Toronto by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in August
For Toronto in August, pack light summer clothes such as T-shirts, shorts or light dresses.
August in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Toronto | 2476 | 1865 | 592.3 |
| Markham | 2781 | 1662 | 552.2 |
| Brampton | 2882 | 1660 | 632.5 |
| Ajax | 2781 | 1763 | 542.1 |
| Oshawa | 2781 | 1763 | 542.1 |
| St. Catharines | 2679 | 1966 | 712.8 |
| Guelph | 2781 | 1559 | 632.5 |
| Barrie | 2578 | 1661 | 502.0 |
| Brantford | 2882 | 1762 | 652.6 |
Nearby places that are more than 1 °C1.8 °F warmer in August: St. Catharines.
Other months in Toronto
- January−1 °C31 °F / −5 °C22 °F
- February−1 °C31 °F / −6 °C22 °F
- March3 °C38 °F / −3 °C27 °F
- April8 °C47 °F / 2 °C35 °F
- May14 °C58 °F / 7 °C45 °F
- June21 °C69 °F / 14 °C57 °F
- July25 °C76 °F / 18 °C64 °F
- August24 °C76 °F / 18 °C65 °F
- September21 °C69 °F / 15 °C59 °F
- October14 °C57 °F / 9 °C47 °F
- November7 °C45 °F / 3 °C37 °F
- December2 °C36 °F / −2 °C28 °F
Frequently asked questions
How warm is Toronto in August?
In August the average high in Toronto is 24 °C (76 °F) and the average low is 18 °C (65 °F).
Does it rain a lot in Toronto in August?
On average about 59 mm (2.3 in) of precipitation falls in August; it ranks 9th of the 12 months.
Is August the warmest month in Toronto?
No. The warmest month in Toronto is July, with an average high of 25 °C (76 °F). The coldest month is February, with an average low of -6 °C (22 °F).
How long is the day in Toronto in August?
In the middle of August the day in Toronto lasts about 14.0 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Toronto in August?
The average relative humidity in August is about 72%. This is a long-term average for the whole day.
How cloudy is Toronto in August?
On average about 62% of the sky is covered by cloud in August. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 99 m, while Toronto lies at about 161 m. Temperatures on this page were therefore adjusted by −0.4 °C0.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.