Cardiff Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 45 °F7 °C Feb 50 °F10 °C Mar 52 °F11 °C Apr 54 °F12 °C May 59 °F15 °C Jun 63 °F17 °C Jul 70 °F21 °C Aug 68 °F20 °C Sep 63 °F17 °C Oct 57 °F14 °C Nov 47 °F9 °C Dec 46 °F8 °C Humidity Jan 76% Feb 77% Mar 77% Apr 73% May 73% Jun 78% Jul 75% Aug 78% Sep 80% Oct 84% Nov 84% Dec 84% Rain Jan 23mm Feb 31mm Mar 53mm Apr 35mm May 19mm Jun 142mm Jul 22mm Aug 69mm Sep 74mm Oct 76mm Nov 83mm Dec 64mm Clouds Jan 59% Feb 61% Mar 71% Apr 78% May 59% Jun 75% Jul 69% Aug 58% Sep 63% Oct 81% Nov 85% Dec 75% Air quality US AQI Jan 40 Feb 41 Mar 38 Apr 44 May 46 Jun 42 Jul 29 Aug 26 Sep 27 Oct 32 Nov 32 Dec 34 Sun Jan 1UVI Feb 2UVI Mar 2UVI Apr 3UVI May 5UVI Jun 4UVI Jul 6UVI Aug 4UVI Sep 4UVI Oct 2UVI Nov 1UVI Dec 0UVI
