April in Uiju averages a daily high of 16.1°C with nights around 5.6°C. Expect roughly 11 wet days totalling 77.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Uiju is September–October.
Based on SINUIJU, KN (16.8km), 1995–2024. 22 years of April data.