May in Sydney averages a daily high of 13.1°C with nights around 2.9°C. Expect roughly 13.9 wet days totalling 98.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Sydney is July–September.
Based on SYDNEY A, NS CA (10.8km), 1995–2024. 20 years of May data.