August in Kaunas averages a daily high of 23.6°C with nights around 12.6°C. Expect roughly 12.8 wet days totalling 77.1mm. 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. 24 years of August data.