Isla Mujeres Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 79 °F26 °C Feb 82 °F28 °C Mar 82 °F28 °C Apr 84 °F29 °C May 86 °F30 °C Jun 88 °F31 °C Jul 88 °F31 °C Aug 90 °F32 °C Sep 88 °F31 °C Oct 86 °F30 °C Nov 84 °F29 °C Dec 81 °F27 °C Humidity Jan 69% Feb 70% Mar 70% Apr 72% May 75% Jun 75% Jul 73% Aug 74% Sep 74% Oct 74% Nov 72% Dec 70% Rain Jan 70mm Feb 19mm Mar 13mm Apr 114mm May 32mm Jun 96mm Jul 54mm Aug 56mm Sep 98mm Oct 117mm Nov 53mm Dec 34mm Clouds Jan 37% Feb 14% Mar 14% Apr 17% May 23% Jun 39% Jul 28% Aug 39% Sep 49% Oct 61% Nov 39% Dec 26% Sun Jan 7UVI Feb 9UVI Mar 11UVI Apr 12UVI May 11UVI Jun 10UVI Jul 10UVI Aug 10UVI Sep 9UVI Oct 7UVI Nov 7UVI Dec 6UVI