Sydney Weather OverviewScoresFors & AgainstsWeatherPhotos Average Temperature Jan 82 °F28 °C Feb 79 °F26 °C Mar 77 °F25 °C Apr 74 °F24 °C May 70 °F21 °C Jun 63 °F17 °C Jul 63 °F17 °C Aug 63 °F17 °C Sep 66 °F19 °C Oct 72 °F22 °C Nov 74 °F24 °C Dec 77 °F25 °C Humidity Jan 74% Feb 67% Mar 68% Apr 68% May 61% Jun 69% Jul 54% Aug 53% Sep 62% Oct 65% Nov 65% Dec 67% Rain Jan 29mm Feb 26mm Mar 73mm Apr 9mm May 10mm Jun 140mm Jul 13mm Aug 31mm Sep 25mm Oct 22mm Nov 43mm Dec 5mm Clouds Jan 30% Feb 46% Mar 53% Apr 28% May 20% Jun 45% Jul 21% Aug 20% Sep 32% Oct 29% Nov 33% Dec 43% Air quality US AQI Jan 34 Feb 26 Mar 20 Apr 29 May 26 Jun 25 Jul 24 Aug 23 Sep 23 Oct 23 Nov 22 Dec 36 Sun Jan 12UVI Feb 9UVI Mar 7UVI Apr 5UVI May 4UVI Jun 3UVI Jul 3UVI Aug 4UVI Sep 6UVI Oct 8UVI Nov 9UVI Dec 10UVI