May in Bīrjand averages a daily high of 31.2°C with nights around 15.6°C. Expect roughly 3.2 wet days totalling 9.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Bīrjand is March–April.
Based on BIRJAND, IR (5.5km), 1995–2024. 20 years of May data.