May in Helong averages a daily high of 21.2°C with nights around 7.5°C. Expect roughly 11.5 wet days totalling 62.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Helong is May.
Based on YANJI, CH (54.9km), 1995–2024. 24 years of May data.