September in Khomeyn averages a daily high of 31.3°C with nights around 13.7°C. Rain is rare — about 0.5 wet days and 3.1mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Khomeyn is May.
Based on ARAK, IR (59.5km), 1995–2024. 23 years of September data.