Posted May 5, 2026, 1:07 PM
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DesignerGuy
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Join Date: Jun 2023
Location: Ottawa
Posts: 63
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Ottawa and Montreal have pretty much the same average highs as SW Ontario from May-October with a 1-2 degree difference from Windsor. It's only the winter that is significantly colder with average highs of -2 in Dec, -5 in Jan and -4 in February
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