Mission, TX Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 66 °F19 °C Feb 73 °F23 °C Mar 79 °F26 °C Apr 84 °F29 °C May 91 °F33 °C Jun 92 °F34 °C Jul 95 °F35 °C Aug 97 °F36 °C Sep 91 °F33 °C Oct 88 °F31 °C Nov 76 °F25 °C Dec 73 °F23 °C Humidity Jan 75% Feb 83% Mar 78% Apr 74% May 78% Jun 77% Jul 71% Aug 67% Sep 74% Oct 74% Nov 77% Dec 74% Rain Jan 18mm Feb 11mm Mar 22mm Apr 19mm May 65mm Jun 159mm Jul 48mm Aug 81mm Sep 144mm Oct 43mm Nov 54mm Dec 10mm Clouds Jan 50% Feb 72% Mar 65% Apr 37% May 47% Jun 35% Jul 18% Aug 17% Sep 19% Oct 24% Nov 57% Dec 34% Air quality US AQI Jan 26 Feb 44 Mar 35 Apr 37 May 49 Jun 45 Jul 44 Aug 38 Sep 30 Oct 26 Nov 30 Dec 32 Sun Jan 5UVI Feb 6UVI Mar 7UVI Apr 11UVI May 9UVI Jun 10UVI Jul 11UVI Aug 11UVI Sep 9UVI Oct 8UVI Nov 6UVI Dec 5UVI