May in Nikšić averages a daily high of 20.2°C with nights around 9.9°C. Expect roughly 13.6 wet days totalling 136.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nikšić is June–October.
Based on NIKSIC, MJ (1.5km), 1995–2024. 16 years of May data.