September in Melbourne averages a daily high of 17.8°C with nights around 7.9°C. Expect roughly 11 wet days totalling 43.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Melbourne is November–April.
Based on ESSENDON AIRPORT, AS (10.8km), 1995–2024. 22 years of September data.