June in Karaj averages a daily high of 35.1°C with nights around 22.5°C. Rain is rare — about 1.5 wet days and 8.5mm across the month. Generally workable, with some weather to plan around.
Across the year, the best time to visit Karaj is April.
Based on TEHRAN MEHRABAD, IR (33.8km), 1995–2024. 17 years of June data.