April in Heihe averages a daily high of 11.4°C with nights around -0.9°C. Expect roughly 5.8 wet days totalling 25.2mm. 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. 30 years of April data.