Espoo Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 27 °F-3 °C Feb 35 °F2 °C Mar 36 °F2 °C Apr 49 °F10 °C May 54 °F12 °C Jun 68 °F20 °C Jul 68 °F20 °C Aug 68 °F20 °C Sep 55 °F13 °C Oct 45 °F7 °C Nov 39 °F4 °C Dec 37 °F3 °C Humidity Jan 70% Feb 74% Mar 72% Apr 56% May 62% Jun 66% Jul 68% Aug 77% Sep 81% Oct 83% Nov 81% Dec 84% Rain Jan 32mm Feb 26mm Mar 38mm Apr 4mm May 36mm Jun 101mm Jul 41mm Aug 30mm Sep 37mm Oct 73mm Nov 38mm Dec 50mm Clouds Jan 92% Feb 82% Mar 76% Apr 44% May 72% Jun 52% Jul 65% Aug 51% Sep 70% Oct 89% Nov 98% Dec 93% Air quality US AQI Jan 18 Feb 24 Mar 18 Apr 21 May 21 Jun 20 Jul 21 Aug 20 Sep 17 Oct 14 Nov 19 Dec 16 Sun Jan 0UVI Feb 1UVI Mar 1UVI Apr 3UVI May 3UVI Jun 5UVI Jul 5UVI Aug 3UVI Sep 2UVI Oct 1UVI Nov 0UVI Dec 0UVI