Christchurch weather in September
September in Christchurch: cool, a little rain, with clean air — a great time to visit.
#8 of 12 months in Christchurch · #320 of 604 destinations to visit in September · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Christchurch climate normals — September
| Daytime high | 14°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 42°F | |
| Feels like (high) | 12°C / 54°F | |
| Rainfall | 44 mm / 1.7 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 6°C / 42°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 11.8 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 25 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Christchurch in September — FAQ
- Is September a good time to visit Christchurch?
- September in Christchurch: cool, a little rain, with clean air — a great time to visit. It ranks #8 of 12 months for Christchurch on SeasonMap's comfort score (79/100).
- What is the weather like in Christchurch in September?
- In September, Christchurch averages a daily high of 14.3°C and a low of 5.8°C, with about 44.2 mm of rain over roughly 8.4 rainy days.
- What is the air quality in Christchurch in September?
- Christchurch has a mean US Air Quality Index of about 25 in September.