Reykjavik Weather OverviewScoresFors & AgainstsWeatherPhotos Reykjavík has a Average Temperature Jan 34 °F1 °C Feb 37 °F3 °C Mar 37 °F3 °C Apr 48 °F9 °C May 50 °F10 °C Jun 54 °F12 °C Jul 61 °F16 °C Aug 55 °F13 °C Sep 52 °F11 °C Oct 45 °F7 °C Nov 39 °F4 °C Dec 34 °F1 °C Humidity Jan 77% Feb 70% Mar 72% Apr 69% May 69% Jun 63% Jul 68% Aug 64% Sep 72% Oct 69% Nov 77% Dec 74% Rain Jan 83mm Feb 56mm Mar 56mm Apr 57mm May 27mm Jun 15mm Jul 39mm Aug 25mm Sep 91mm Oct 38mm Nov 32mm Dec 55mm Clouds Jan 75% Feb 76% Mar 80% Apr 82% May 70% Jun 60% Jul 71% Aug 67% Sep 77% Oct 77% Nov 77% Dec 68% Sun Jan 0UVI Feb 0UVI Mar 1UVI Apr 2UVI May 3UVI Jun 4UVI Jul 4UVI Aug 3UVI Sep 2UVI Oct 1UVI Nov 0UVI Dec 0UVI