Ruian Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 50 °F10 °C Feb 51 °F11 °C Mar 59 °F15 °C Apr 69 °F21 °C May 72 °F22 °C Jun 75 °F24 °C Jul 81 °F27 °C Aug 82 °F28 °C Sep 79 °F26 °C Oct 70 °F21 °C Nov 64 °F18 °C Dec 54 °F12 °C Humidity Jan 81% Feb 84% Mar 80% Apr 85% May 77% Jun 97% Jul 99% Aug 90% Sep 81% Oct 78% Nov 73% Dec 78% Rain Jan 19mm Feb 57mm Mar 56mm Apr 59mm May 55mm Jun 145mm Jul 146mm Aug 113mm Sep 46mm Oct 38mm Nov 16mm Dec 20mm Clouds Jan 51% Feb 76% Mar 59% Apr 67% May 64% Jun 90% Jul 95% Aug 51% Sep 17% Oct 43% Nov 45% Dec 54% Air quality US AQI Jan 92 Feb 86 Mar 92 Apr 90 May 77 Jun 64 Jul 57 Aug 60 Sep 68 Oct 85 Nov 86 Dec 106 Sun Jan 5UVI Feb 6UVI Mar 7UVI Apr 7UVI May 8UVI Jun 5UVI Jul 5UVI Aug 8UVI Sep 10UVI Oct 7UVI Nov 5UVI Dec 5UVI