Severe heat and humidity sweep in during summer, as predicted by weather forecasters.
Simcoe County, Ontario residents can look forward to a warm summer week ahead, with temperatures reaching the high 20s to around 30°C, according to Environment Canada. The weather is expected to be summer-like, starting from Thursday, July 3, 2025.
Thursday will commence with a mix of sun and clouds, and there is a chance of morning showers. Daytime highs are predicted to be around 27°C, feeling warmer due to humidity, with the UV index reaching a very high eight.
Friday, July 4, will offer mainly sunny skies, but with periods of clouds. Highs will be around 27°C, with the UV index remaining very high.
The weekend (Saturday and Sunday, July 5-6) is set to be hot, with daytime highs reaching about 30°C. A mix of sun and clouds will provide some relief, and there is a slight chance of showers both days. Overnight lows will be around 20°C. Although thunderstorms are not specifically highlighted for the weekend, the slight showers suggest potential for some isolated storm activity.
The start of next week (Monday, July 7) will bring a high of about 26°C and the risk of a few thunderstorms. These storms may bring much-needed rain but could disrupt outdoor plans. The UV index is expected to remain elevated during this period.
Additional context from nearby Orillia forecasts supports these conditions, showing highs mostly in the mid to high 20s°C and a very high UV index around 8 to 9, with showers and thunderstorms possible especially early in the week.
In summary, residents can expect **hot and humid weather with daily highs mostly in the high 20s to around 30°C**, very **high UV index near 8**, occasional **showers and a risk of thunderstorms mainly early next week** in Simcoe County. The overall weather is typical of summer with potential for heat and some storm activity. Stay tuned for further updates on the weather conditions in Simcoe County.
[1] Environment Canada Weather Forecast for Simcoe County, Ontario:
The environment in Simcoe County, Ontario, is expected to be hot and humid, with daily highs mostly in the high 20s to around 30°C, according to Environment Canada's weather forecast. This summer-like weather, starting from Thursday, July 3, 2025, will also feature a very high UV index near 8, occasional showers, and a risk of thunderstorms, mainly early next week.
