April in Hangzhou averages a daily high of 22°C with nights around 12.9°C. Expect roughly 13.2 wet days totalling 117.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hangzhou is May.
Based on HANGZHOU, CH (6.8km), 1995–2024. 19 years of April data.