April in Kaunas averages a daily high of 13°C with nights around 2.7°C. Expect roughly 11 wet days totalling 32.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kaunas is May–September.
Based on KAUNAS, LH (5.3km), 1995–2024. 25 years of April data.