September in Harsīn averages a daily high of 34°C with nights around 12.4°C. Rain is rare — about 0.3 wet days and 1.2mm across the month. Generally workable, with some weather to plan around.
Across the year, the best time to visit Harsīn is May.
Based on KERMANSHAH, IR (43.1km), 1995–2024. 25 years of September data.