Barrie Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 23 °F-5 °C Feb 25 °F-4 °C Mar 32 °F0 °C Apr 45 °F7 °C May 57 °F14 °C Jun 67 °F20 °C Jul 77 °F25 °C Aug 73 °F23 °C Sep 67 °F20 °C Oct 57 °F14 °C Nov 37 °F3 °C Dec 30 °F-1 °C Humidity Jan 65% Feb 69% Mar 66% Apr 71% May 74% Jun 73% Jul 75% Aug 69% Sep 76% Oct 72% Nov 72% Dec 73% Rain Jan 41mm Feb 44mm Mar 28mm Apr 65mm May 75mm Jun 89mm Jul 120mm Aug 93mm Sep 59mm Oct 75mm Nov 41mm Dec 43mm Clouds Jan 71% Feb 83% Mar 48% Apr 71% May 59% Jun 45% Jul 25% Aug 20% Sep 46% Oct 48% Nov 73% Dec 71% Sun Jan 1UVI Feb 2UVI Mar 3UVI Apr 4UVI May 5UVI Jun 7UVI Jul 8UVI Aug 7UVI Sep 5UVI Oct 3UVI Nov 2UVI Dec 1UVI