Ontario Long Range Weather Forecast for July 13th to August 12th
July 2026
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12Hot and stormy; strong thunderstorms possible in Ottawa Valley and greater Toronto Area.
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16Cooler air moves in, breezy and dry across most regions, crisp mornings in the north.
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20Widespread rain; heaviest in southwestern Ontario.
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24Warm and fair.
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28Stormy finish; thunder and heavy rain likely in eastern Ontario.
August 2026
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1Humid and stormy; strong thunderstorms likely from Windsor to Ottawa, cooler in northern Ontario.
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4Dry and breezy; fair skies in Toronto.
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8Heat builds; thunderstorms.
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12Sharp cool down; gusty winds and scattered showers sweep across eastern and central Ontario.
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