Xi An Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 43 °F6 °C Feb 46 °F8 °C Mar 63 °F17 °C Apr 73 °F23 °C May 75 °F24 °C Jun 86 °F30 °C Jul 91 °F33 °C Aug 88 °F31 °C Sep 79 °F26 °C Oct 66 °F19 °C Nov 57 °F14 °C Dec 48 °F9 °C Humidity Jan 34% Feb 51% Mar 40% Apr 56% May 55% Jun 60% Jul 58% Aug 71% Sep 70% Oct 74% Nov 61% Dec 47% Rain Jan 2mm Feb 3mm Mar 3mm Apr 17mm May 15mm Jun 33mm Jul 26mm Aug 48mm Sep 53mm Oct 32mm Nov 6mm Dec 1mm Clouds Jan 33% Feb 65% Mar 66% Apr 55% May 77% Jun 77% Jul 47% Aug 65% Sep 51% Oct 78% Nov 47% Dec 40% Air quality US AQI Jan 201 Feb 177 Mar 144 Apr 123 May 109 Jun 92 Jul 83 Aug 86 Sep 92 Oct 122 Nov 162 Dec 173 Sun Jan 3UVI Feb 4UVI Mar 5UVI Apr 6UVI May 6UVI Jun 5UVI Jul 8UVI Aug 7UVI Sep 7UVI Oct 4UVI Nov 3UVI Dec 3UVI