August in Rasht averages a daily high of 30.3°C with nights around 23.7°C. Expect roughly 6.3 wet days totalling 119.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Rasht is May–June.
Based on ANZALI, IR (23.8km), 1995–2024. 22 years of August data.