July in Sinŭiju averages a daily high of 28.3°C with nights around 20.7°C. Expect roughly 15 wet days totalling 278.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sinŭiju is September–October.
Based on SINUIJU, KN (1.3km), 1995–2024. 22 years of July data.