May in Smolensk averages a daily high of 18.6°C with nights around 7.5°C. Expect roughly 12.9 wet days totalling 72.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Smolensk is May–September.
Based on SMOLENSK, RS (3.3km), 1995–2024. 25 years of May data.