Grand Island, NE Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 34 °F 1 °C Feb 21 °F -6 °C Mar 39 °F 4 °C Apr 60 °F 16 °C May 61 °F 16 °C Jun 78 °F 26 °C Jul 82 °F 28 °C Aug 79 °F 26 °C Sep 79 °F 26 °C Oct 55 °F 13 °C Nov 47 °F 9 °C Dec 36 °F 2 °C Humidity Jan 73% Feb 66% Mar 72% Apr 61% May 73% Jun 71% Jul 78% Aug 88% Sep 75% Oct 60% Nov 61% Dec 73% Rain Jan 9mm Feb 22mm Mar 58mm Apr 31mm May 138mm Jun 193mm Jul 84mm Aug 139mm Sep 38mm Oct 41mm Nov 31mm Dec 25mm Clouds Jan 51% Feb 55% Mar 52% Apr 31% May 47% Jun 26% Jul 21% Aug 43% Sep 22% Oct 25% Nov 33% Dec 38% Air quality US AQI Jan 38 Feb 43 Mar 24 Apr 22 May 21 Jun 25 Jul 35 Aug 31 Sep 24 Oct 24 Nov 26 Dec 36 Sun Jan 2UVI Feb 3UVI Mar 4UVI Apr 6UVI May 7UVI Jun 8UVI Jul 9UVI Aug 7UVI Sep 7UVI Oct 4UVI Nov 2UVI Dec 1UVI