Santa Cruz Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 86 °F30 °C Feb 88 °F31 °C Mar 84 °F29 °C Apr 84 °F29 °C May 79 °F26 °C Jun 79 °F26 °C Jul 81 °F27 °C Aug 84 °F29 °C Sep 88 °F31 °C Oct 88 °F31 °C Nov 90 °F32 °C Dec 86 °F30 °C Humidity Jan 79% Feb 74% Mar 82% Apr 83% May 80% Jun 73% Jul 66% Aug 44% Sep 47% Oct 58% Nov 68% Dec 78% Rain Jan 85mm Feb 41mm Mar 73mm Apr 75mm May 57mm Jun 68mm Jul 40mm Aug 4mm Sep 37mm Oct 42mm Nov 120mm Dec 89mm Clouds Jan 70% Feb 78% Mar 87% Apr 88% May 65% Jun 47% Jul 46% Aug 7% Sep 50% Oct 54% Nov 67% Dec 77% Sun Jan 7UVI Feb 7UVI Mar 6UVI Apr 6UVI May 6UVI Jun 6UVI Jul 5UVI Aug 9UVI Sep 8UVI Oct 10UVI Nov 10UVI Dec 7UVI