September in Chełm averages a daily high of 19.3°C with nights around 8.2°C. Expect roughly 9.6 wet days totalling 45.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Chełm is May–September.
Based on WLODAWA, PL (45.4km), 1995–2024. 29 years of September data.