May in Kāshān averages a daily high of 32.9°C with nights around 18.3°C. Expect roughly 3.3 wet days totalling 9.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kāshān is March–April.
Based on KASHAN, IR (17.5km), 1995–2024. 19 years of May data.