August in Siedlce averages a daily high of 24.6°C with nights around 11.8°C. Expect roughly 11.6 wet days totalling 69.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Siedlce is May–September.
Based on SIEDLCE, PL (9.5km), 1995–2024. 30 years of August data.