April in Kaliningrad averages a daily high of 13.3°C with nights around 3.3°C. Expect roughly 9.3 wet days totalling 38.3mm. 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 April data.