April in Hailar averages a daily high of 9.8°C with nights around -3.1°C. Expect roughly 4.9 wet days totalling 14mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Hailar is May–June.
Based on HAILAR, CH (5.6km), 1995–2024. 23 years of April data.