May in Oss averages a daily high of 19.2°C with nights around 7.7°C. Expect roughly 12.2 wet days totalling 61.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Oss is May–September.
Based on VOLKEL, NL (17.6km), 1995–2024. 30 years of May data.