July in Białystok averages a daily high of 24.4°C with nights around 12.7°C. Expect roughly 14.8 wet days totalling 92.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Białystok is May–September.
Based on BIALYSTOK, PL (3.7km), 1995–2024. 30 years of July data.