Okayama Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 48 °F9 °C Feb 52 °F11 °C Mar 55 °F13 °C Apr 64 °F18 °C May 75 °F24 °C Jun 77 °F25 °C Jul 82 °F28 °C Aug 88 °F31 °C Sep 82 °F28 °C Oct 72 °F22 °C Nov 64 °F18 °C Dec 52 °F11 °C Humidity Jan 63% Feb 65% Mar 64% Apr 62% May 58% Jun 77% Jul 86% Aug 77% Sep 78% Oct 74% Nov 70% Dec 71% Rain Jan 14mm Feb 25mm Mar 72mm Apr 68mm May 56mm Jun 165mm Jul 110mm Aug 111mm Sep 42mm Oct 52mm Nov 9mm Dec 42mm Clouds Jan 35% Feb 63% Mar 64% Apr 53% May 68% Jun 77% Jul 80% Aug 73% Sep 60% Oct 72% Nov 43% Dec 54% Air quality US AQI Jan 55 Feb 61 Mar 60 Apr 64 May 67 Jun 58 Jul 67 Aug 56 Sep 48 Oct 51 Nov 63 Dec 50 Sun Jan 3UVI Feb 4UVI Mar 4UVI Apr 6UVI May 5UVI Jun 5UVI Jul 5UVI Aug 5UVI Sep 6UVI Oct 4UVI Nov 4UVI Dec 2UVI