Click on a day for an hourly weather forecast
The temperatures in Wellington in September are usually low and can range between 10°C and 13°C.
You can expect about 3 to 8 days of rain in Wellington during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Wellington in September 2025.
If you’re planning to visit Wellington in the near future, we highly recommend that you review the 14 day weather forecast for Wellington before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 19° / 15° | 3 | 28 | 0 | 50 mm | Good | Wellington in January |
| February | 19° / 15° | 3 | 25 | 0 | 74 mm | Good | Wellington in February |
| March | 18° / 14° | 4 | 27 | 0 | 53 mm | Good | Wellington in March |
| April | 16° / 13° | 4 | 26 | 0 | 74 mm | Good | Wellington in April |
| May | 14° / 12° | 4 | 27 | 0 | 75 mm | Good | Wellington in May |
| June | 12° / 10° | 6 | 24 | 0 | 108 mm | Ok | Wellington in June |
| July | 12° / 9° | 5 | 26 | 0 | 91 mm | Ok | Wellington in July |
| August | 12° / 9° | 6 | 25 | 0 | 85 mm | Ok | Wellington in August |
| September | 13° / 10° | 5 | 25 | 0 | 74 mm | Ok | Wellington in September |
| October | 14° / 11° | 5 | 26 | 0 | 76 mm | Good | Wellington in October |
| November | 15° / 12° | 3 | 27 | 0 | 76 mm | Good | Wellington in November |
| December | 17° / 14° | 5 | 26 | 0 | 82 mm | Good | Wellington in December |