Weather in Toronto in August 2025
- August is usually the hottest month of the year in Toronto;
Average weather
Average temperature in Toronto in August
The expected average maximum temperature in August is +25°C with a maximum of +29°C and a minimum of +11°C.
The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +24°C to +22°C.
Is Toronto warm or cold in August?
Toronto is typically warm in August.
Maximum temperatures go up compared to the previous month from +25°C to +25°C. The minimum temperature also goes up from +18°C to +18°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Toronto, here is the comparison with other months:
Water temperature in Toronto in August
Water in Toronto in August is Comfortable. It varies from +20°C to +24°C, with an average of +22°C. This is almost similar to the air temperature, which averages +25°C.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Toronto in August?
Climate in Toronto in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +25°C | +21°C | ||||
| Min. temperature | ||||||
| +9°C | +9°C | +3°C | ||||
| Max. temperature | ||||||
| +37°C | +35°C | +33°C | ||||
| Rainfall | ||||||
| 74 mm | 68 mm | 81 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +21°C | +22°C | +20°C | ||||
| Humidity | ||||||
| 71% | 73% | 74% | ||||
| Air pressure | ||||||
| 1013 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 9 | 9 | 9 | ||||
| Cloudy days | ||||||
| 7 | 7 | 7 | ||||
| Rainy days | ||||||
| 11 | 11 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +25°C for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 74 mm to 68 mm. Humidity rises from 71% to 73%. The average wind speed doesn’t change much during August, staying around 3 m/s. The amount of sunny days stay about the same, averaging 9 sunny days during the month.
September brings much the same weather, it remains good.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Toronto is gradually increasing during August, going from 3 m/s to 4 m/s over the course of the month.
Rain
How was the weather last August in Toronto?
Climate Change over Years
The climate in Toronto in August has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+11°C) and the highest in 2012 (+15°C). The driest year was 1994 with only 432 mm of rainfall, and the wettest year was 2023 with 1271 mm.
FAQ
Is August a good time to visit Toronto?
Can you sunbathe in Toronto in August?
Can you swim in Toronto in August?
Is Toronto rainy in August?
Is it sunny in Toronto in August?
Other cities in Canada
Monthly weather in Toronto
Source of the data
For this page, we’ve looked at the typical weather in Toronto, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.