Duluth, MN Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 16 °F -9 °C Feb 17 °F -9 °C Mar 34 °F 1 °C Apr 42 °F 6 °C May 52 °F 11 °C Jun 61 °F 16 °C Jul 77 °F 25 °C Aug 72 °F 22 °C Sep 61 °F 16 °C Oct 48 °F 9 °C Nov 32 °F 0 °C Dec 28 °F -2 °C Humidity Jan 67% Feb 71% Mar 58% Apr 67% May 66% Jun 70% Jul 66% Aug 67% Sep 81% Oct 73% Nov 69% Dec 76% Rain Jan 2mm Feb 9mm Mar 9mm Apr 17mm May 11mm Jun 35mm Jul 9mm Aug 8mm Sep 12mm Oct 8mm Nov 3mm Dec 5mm Clouds Jan 47% Feb 65% Mar 33% Apr 59% May 44% Jun 31% Jul 31% Aug 33% Sep 62% Oct 62% Nov 66% Dec 70% Air quality US AQI Jan 35 Feb 53 Mar 53 Apr 53 May 53 Jun 53 Jul 25 Aug 21 Sep 20 Oct 26 Nov 26 Dec 41 Sun Jan 1UVI Feb 2UVI Mar 3UVI Apr 4UVI May 6UVI Jun 7UVI Jul 8UVI Aug 6UVI Sep 4UVI Oct 3UVI Nov 1UVI Dec 1UVI
