April in Semnan averages a daily high of 25°C with nights around 13.1°C. Expect roughly 4.8 wet days totalling 14.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Semnan is March–April.
Based on SEMNAN, IR (9.4km), 1995–2024. 18 years of April data.