Hoi An Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 77 °F25 °C Feb 82 °F28 °C Mar 84 °F29 °C Apr 90 °F32 °C May 91 °F33 °C Jun 93 °F34 °C Jul 91 °F33 °C Aug 91 °F33 °C Sep 86 °F30 °C Oct 84 °F29 °C Nov 81 °F27 °C Dec 77 °F25 °C Humidity Jan 77% Feb 76% Mar 75% Apr 72% May 70% Jun 68% Jul 67% Aug 68% Sep 73% Oct 74% Nov 75% Dec 74% Rain Jan 66mm Feb 10mm Mar 27mm Apr 27mm May 75mm Jun 88mm Jul 105mm Aug 149mm Sep 101mm Oct 128mm Nov 102mm Dec 37mm Clouds Jan 70% Feb 23% Mar 26% Apr 56% May 77% Jun 86% Jul 88% Aug 94% Sep 67% Oct 55% Nov 65% Dec 74% Air quality US AQI Jan 53 Feb 87 Mar 100 Apr 76 May 57 Jun 26 Jul 29 Aug 23 Sep 37 Oct 50 Nov 26 Dec 46 Sun Jan 6UVI Feb 10UVI Mar 11UVI Apr 10UVI May 7UVI Jun 6UVI Jul 6UVI Aug 5UVI Sep 8UVI Oct 8UVI Nov 6UVI Dec 5UVI