September in Christchurch averages a daily high of 14.9°C. Expect roughly 10.3 wet days totalling 38.7mm. 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. 15 years of September data.