Greenville, SC Weather OverviewScoresFors & AgainstsWeatherPhotos Greenville, like much of the Average Temperature Jan 50 °F10 °C Feb 58 °F15 °C Mar 59 °F15 °C Apr 71 °F22 °C May 79 °F26 °C Jun 82 °F28 °C Jul 86 °F30 °C Aug 88 °F31 °C Sep 87 °F31 °C Oct 72 °F22 °C Nov 57 °F14 °C Dec 54 °F12 °C Humidity Jan 69% Feb 71% Mar 54% Apr 67% May 72% Jun 73% Jul 78% Aug 76% Sep 67% Oct 76% Nov 70% Dec 70% Rain Jan 92mm Feb 98mm Mar 58mm Apr 95mm May 57mm Jun 100mm Jul 79mm Aug 134mm Sep 22mm Oct 65mm Nov 61mm Dec 71mm Clouds Jan 43% Feb 63% Mar 53% Apr 44% May 27% Jun 39% Jul 32% Aug 30% Sep 8% Oct 41% Nov 38% Dec 39% Air quality US AQI Jan 32 Feb 26 Mar 23 Apr 32 May 30 Jun 30 Jul 34 Aug 32 Sep 36 Oct 29 Nov 32 Dec 32 Sun Jan 3UVI Feb 4UVI Mar 6UVI Apr 7UVI May 9UVI Jun 8UVI Jul 9UVI Aug 9UVI Sep 8UVI Oct 5UVI Nov 3UVI Dec 3UVI