December in Khomeyn averages a daily high of 8.7°C with nights around -4.1°C. Expect roughly 6.6 wet days totalling 36.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Khomeyn is May.
Based on ARAK, IR (59.5km), 1995–2024. 20 years of December data.