Peoria, IL Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 30 °F-1 °C Feb 30 °F-1 °C Mar 43 °F6 °C Apr 57 °F14 °C May 70 °F21 °C Jun 78 °F26 °C Jul 84 °F29 °C Aug 81 °F27 °C Sep 78 °F26 °C Oct 61 °F16 °C Nov 42 °F6 °C Dec 43 °F6 °C Humidity Jan 77% Feb 74% Mar 66% Apr 70% May 79% Jun 78% Jul 77% Aug 77% Sep 79% Oct 72% Nov 74% Dec 77% Rain Jan 27mm Feb 39mm Mar 54mm Apr 37mm May 135mm Jun 76mm Jul 26mm Aug 52mm Sep 107mm Oct 45mm Nov 25mm Dec 22mm Clouds Jan 67% Feb 64% Mar 56% Apr 52% May 63% Jun 47% Jul 24% Aug 36% Sep 41% Oct 38% Nov 48% Dec 54% Air quality US AQI Jan 34 Feb 40 Mar 35 Apr 31 May 38 Jun 33 Jul 42 Aug 35 Sep 33 Oct 30 Nov 37 Dec 42 Sun Jan 2UVI Feb 3UVI Mar 4UVI Apr 5UVI May 7UVI Jun 7UVI Jul 9UVI Aug 8UVI Sep 6UVI Oct 4UVI Nov 2UVI Dec 1UVI
