Ontario Long Range Weather Forecast for July 17th to August 16th
July 2026
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16th - 19th
Cooler air moves in, breezy and dry across most regions, crisp mornings in the north.
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20th - 23rd
Widespread rain; heaviest in southwestern Ontario.
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24th - 27th
Warm and fair.
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28th - 31st
Stormy finish; thunder and heavy rain likely in eastern Ontario.
August 2026
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1st - 3rd
Humid and stormy; strong thunderstorms likely from Windsor to Ottawa, cooler in northern Ontario.
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4th - 7th
Dry and breezy; fair skies in Toronto.
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8th - 11th
Heat builds; thunderstorms.
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12th - 15th
Sharp cool down; gusty winds and scattered showers sweep across eastern and central Ontario.
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16th - 19th
Stormy stretch; lightning and heavy rain from London to Kingston, cooler air in the north.
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