May in Heihe averages a daily high of 19.7°C with nights around 7.1°C. Expect roughly 10.1 wet days totalling 57.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Heihe is May–June.
Based on BLAGOVESCENSK, RS (1km), 1995–2024. 30 years of May data.