May in Reservoir averages a daily high of 16.8°C with nights around 8.1°C. Expect roughly 11.3 wet days totalling 50.8mm. 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. 22 years of May data.