September in Lāhījān averages a daily high of 26.9°C with nights around 20.3°C. Expect roughly 11.2 wet days totalling 247.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lāhījān is May–June.
Based on ANZALI, IR (56.1km), 1995–2024. 22 years of September data.