July in Heihe averages a daily high of 28°C with nights around 17.6°C. Expect roughly 13 wet days totalling 135.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Heihe is May–June.
Based on BLAGOVESCENSK, RS (1km), 1995–2024. 29 years of July data.