Lille Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 41 °F5 °C Feb 50 °F10 °C Mar 52 °F11 °C Apr 56 °F14 °C May 59 °F15 °C Jun 71 °F22 °C Jul 73 °F23 °C Aug 72 °F22 °C Sep 65 °F19 °C Oct 59 °F15 °C Nov 48 °F9 °C Dec 46 °F8 °C Humidity Jan 81% Feb 78% Mar 73% Apr 67% May 72% Jun 72% Jul 66% Aug 69% Sep 72% Oct 79% Nov 83% Dec 83% Rain Jan 24mm Feb 26mm Mar 44mm Apr 17mm May 30mm Jun 131mm Jul 21mm Aug 21mm Sep 41mm Oct 61mm Nov 41mm Dec 48mm Clouds Jan 89% Feb 66% Mar 75% Apr 46% May 60% Jun 66% Jul 63% Aug 49% Sep 64% Oct 84% Nov 78% Dec 77% Air quality US AQI Jan 41 Feb 65 Mar 34 Apr 49 May 50 Jun 31 Jul 35 Aug 25 Sep 20 Oct 30 Nov 40 Dec 35 Sun Jan 1UVI Feb 2UVI Mar 2UVI Apr 4UVI May 4UVI Jun 6UVI Jul 5UVI Aug 5UVI Sep 4UVI Oct 2UVI Nov 1UVI Dec 1UVI