May in Kaliningrad averages a daily high of 18.4°C with nights around 7.7°C. Expect roughly 11 wet days totalling 52.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kaliningrad is May–September.
Based on KALININGRAD, RS (2.8km), 1995–2024. 26 years of May data.