Eugene, OR Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 48 °F9 °C Feb 43 °F6 °C Mar 52 °F11 °C Apr 58 °F15 °C May 64 °F18 °C Jun 72 °F22 °C Jul 77 °F25 °C Aug 79 °F26 °C Sep 69 °F21 °C Oct 57 °F14 °C Nov 53 °F12 °C Dec 46 °F8 °C Humidity Jan 83% Feb 83% Mar 75% Apr 79% May 71% Jun 64% Jul 65% Aug 65% Sep 78% Oct 78% Nov 85% Dec 87% Rain Jan 41mm Feb 74mm Mar 24mm Apr 58mm May 33mm Jun 11mm Jul 10mm Aug 16mm Sep 62mm Oct 29mm Nov 26mm Dec 51mm Clouds Jan 66% Feb 80% Mar 48% Apr 68% May 45% Jun 18% Jul 25% Aug 19% Sep 44% Oct 41% Nov 65% Dec 74% Air quality US AQI Jan 23 Feb 18 Mar 19 Apr 14 May 16 Jun 19 Jul 22 Aug 29 Sep 24 Oct 31 Nov 44 Dec 31 Sun Jan 1UVI Feb 2UVI Mar 3UVI Apr 4UVI May 5UVI Jun 7UVI Jul 7UVI Aug 7UVI Sep 5UVI Oct 3UVI Nov 2UVI Dec 1UVI