August in Białystok averages a daily high of 24°C with nights around 12.1°C. Expect roughly 11.2 wet days totalling 71mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Białystok is May–September.
Based on BIALYSTOK, PL (3.7km), 1995–2024. 30 years of August data.