May in Christchurch averages a daily high of 14.9°C. Expect roughly 14.5 wet days totalling 62.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Christchurch is November–March.
Based on CHRISTCHURCH INTERNATIONAL, NZ (9.5km), 1995–2024. 19 years of May data.