Sunny weather greets the commencement of the extended vacation period
Weather Forecast for Southern Ontario, August 3-10, 2025
Southern Ontario is set to experience a mix of weather conditions over the coming week, with mild to below-seasonal temperatures initially, followed by increased heat and humidity midweek.
On Monday, August 3, the region can expect a mix of sun and cloud, with the high temperature reaching a pleasant 27°C. The nighttime lows are expected to be comfortable, with low humidity.
On Sunday, August 2, the weather will be sunny, with temperatures peaking at a warm 28°C. Monday will see similar weather conditions, with highs also reaching 27°C.
Tuesday, August 4, will have a mix of sun and cloud, with the high temperature reaching 26°C. Thursday, August 6, will follow a similar pattern, with highs of 27°C. Wednesday, August 5, and Saturday, August 8, will also have a mix of sun and cloud, with highs of 27°C for both days.
Overnight lows throughout the weekend are expected to be comfortable, with temperatures dipping to around 11°C on Saturday night.
Saturday, August 8, will see a humidex of 26, but the morning will offer sunshine, with the afternoon bringing a mix of sun and cloud. The UV index on Saturday is expected to be very high, reaching 8.
Clear conditions and lots of sunshine are expected for Saturday, making it a great day for outdoor activities.
Looking beyond the first week of August, daytime highs are expected to average around 26.2°C, with lows near 15.7°C, suggesting generally warm but not extreme temperatures. Cloud cover will remain mixed, with occasional thunderstorm chances, but long stretches of dry, sunny weather are anticipated later in August.
Stay tuned for more updates on the weather in Southern Ontario!
[1] Weather Network, (2025). Southern Ontario Weather Forecast for August 3-10, 2025. [online] Available at: https://www.theweathernetwork.com/ca/on/southern-ontario/weather/forecast/longrange
[2] AccuWeather, (2025). Southern Ontario Weather Forecast for August 3-10, 2025. [online] Available at: https://www.accuweather.com/en/ca/ontario/southern/weather-forecast/364515
[3] Environment Canada, (2025). Southern Ontario Weather Forecast for August 11-20, 2025. [online] Available at: https://weather.gc.ca/city/pages/on-164_met.html
[4] Environment Canada, (2025). Southern Ontario Weather Forecast for August 3-10, 2025. [online] Available at: https://weather.gc.ca/city/pages/on-164_met.html
The weather forecast for the initial days of August 3-10, 2025, in Southern Ontario indicates a mix of sun and cloud, with temperatures ranging from 26°C to 28°C during the day, and comfortable nighttime lows. Weather-forecasting services predict a humidex of 26 on Saturday, August 8, with occasional chances of thunderstorms as August progresses, though long stretches of sunny weather are anticipated later in the month.
