Guatemala City Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 72 °F22 °C Feb 75 °F24 °C Mar 75 °F24 °C Apr 77 °F25 °C May 75 °F24 °C Jun 73 °F23 °C Jul 73 °F23 °C Aug 73 °F23 °C Sep 72 °F22 °C Oct 72 °F22 °C Nov 72 °F22 °C Dec 72 °F22 °C Humidity Jan 72% Feb 71% Mar 67% Apr 70% May 84% Jun 89% Jul 84% Aug 86% Sep 92% Oct 95% Nov 81% Dec 76% Rain Jan 36mm Feb 37mm Mar 43mm Apr 104mm May 220mm Jun 296mm Jul 325mm Aug 306mm Sep 347mm Oct 248mm Nov 92mm Dec 43mm Clouds Jan 42% Feb 46% Mar 41% Apr 49% May 74% Jun 76% Jul 63% Aug 65% Sep 75% Oct 81% Nov 57% Dec 49% Air quality US AQI Jan 36 Feb 151 Mar 151 Apr 151 May 151 Jun 151 Jul 151 Aug 151 Sep 151 Oct 151 Nov 151 Dec 44 Sun Jan 10UVI Feb 11UVI Mar 12UVI Apr 12UVI May 8UVI Jun 9UVI Jul 10UVI Aug 9UVI Sep 9UVI Oct 8UVI Nov 9UVI Dec 8UVI