Murrieta, CA Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 59 °F15 °C Feb 55 °F13 °C Mar 63 °F17 °C Apr 71 °F22 °C May 66 °F19 °C Jun 74 °F24 °C Jul 84 °F29 °C Aug 88 °F31 °C Sep 85 °F30 °C Oct 79 °F26 °C Nov 75 °F24 °C Dec 59 °F15 °C Humidity Jan 61% Feb 74% Mar 75% Apr 65% May 77% Jun 79% Jul 59% Aug 54% Sep 54% Oct 39% Nov 43% Dec 70% Rain Jan 60mm Feb 110mm Mar 35mm Apr 7mm May 29mm Jun 4mm Jul 7mm Aug 4mm Sep 6mm Oct 2mm Nov 52mm Dec 43mm Clouds Jan 36% Feb 47% Mar 44% Apr 25% May 48% Jun 32% Jul 17% Aug 6% Sep 10% Oct 1% Nov 9% Dec 47% Air quality US AQI Jan 24 Feb 25 Mar 26 Apr 38 May 36 Jun 43 Jul 47 Aug 42 Sep 33 Oct 32 Nov 27 Dec 25 Sun Jan 4UVI Feb 5UVI Mar 6UVI Apr 8UVI May 7UVI Jun 10UVI Jul 11UVI Aug 10UVI Sep 9UVI Oct 6UVI Nov 4UVI Dec 3UVI