Fairfield, CA Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 57 °F14 °C Feb 54 °F12 °C Mar 59 °F15 °C Apr 68 °F20 °C May 68 °F20 °C Jun 79 °F26 °C Jul 81 °F27 °C Aug 82 °F28 °C Sep 80 °F27 °C Oct 73 °F23 °C Nov 69 °F21 °C Dec 55 °F13 °C Humidity Jan 80% Feb 76% Mar 74% Apr 72% May 74% Jun 62% Jul 65% Aug 65% Sep 59% Oct 37% Nov 64% Dec 83% Rain Jan 70mm Feb 113mm Mar 52mm Apr 10mm May 38mm Jun 5mm Jul 6mm Aug 4mm Sep 10mm Oct 4mm Nov 23mm Dec 75mm Clouds Jan 46% Feb 45% Mar 50% Apr 32% May 28% Jun 14% Jul 8% Aug 11% Sep 4% Oct 4% Nov 8% Dec 69% Air quality US AQI Jan 40 Feb 28 Mar 29 Apr 32 May 31 Jun 38 Jul 34 Aug 40 Sep 34 Oct 35 Nov 40 Dec 43 Sun Jan 2UVI Feb 3UVI Mar 5UVI Apr 7UVI May 7UVI Jun 9UVI Jul 10UVI Aug 9UVI Sep 7UVI Oct 5UVI Nov 3UVI Dec 2UVI
