Ontario Long Range Weather Forecast for July 12th to August 11th
July 2025
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12More thunderstorms.
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16Hot (32 to 34 degrees C) yet again, then turning very unsettled.
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20Fair skies.
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24Thunderstorm activity for Great Lakes.
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28Hot; risk of hit-or-miss thunderstorms.
August 2025
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1Squally weather sweeps east through the Great Lakes; torrential rains soak southern Ontario.
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4Fair, hot weather coincides with Simcoe Day festivities.
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8Showery.
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12Fair skies, then turning squally from western Ontario and all points east.
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