September in Reservoir averages a daily high of 17.6°C with nights around 7.4°C. Expect roughly 13 wet days totalling 52.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Reservoir is November–April.
Based on BUNDOORA LATROBE UNIVERSITY, AS (4km), 1995–2024. 23 years of September data.