Wellington weather in September
September in Wellington: cool, rainy, with clean air — a great time to visit.
#9 of 12 months in Wellington · #362 of 604 destinations to visit in September · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Wellington climate normals — September
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 10°C / 50°F | |
| Rainfall | 86 mm / 3.4 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 8.9 h/day | |
| Daylight | 11.8 h | |
| Wind | 33 km/h / 20 mph | |
| Snowfall | 0.1 cm / 0 in | |
| Air quality (US AQI) | 29 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Wellington in September — FAQ
- Is September a good time to visit Wellington?
- September in Wellington: cool, rainy, with clean air — a great time to visit. It ranks #9 of 12 months for Wellington on SeasonMap's comfort score (77/100).
- What is the weather like in Wellington in September?
- In September, Wellington averages a daily high of 12.9°C and a low of 10°C, with about 86.2 mm of rain over roughly 12.4 rainy days.
- What is the air quality in Wellington in September?
- Wellington has a mean US Air Quality Index of about 29 in September.