The weather in Nelson in September is very cold with temperatures between 4°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Nelson 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 Nelson in September 2025.
If you’re planning to visit Nelson in the near future, we highly recommend that you review the 14 day weather forecast for Nelson before you arrive.
Temperatures
14° / 4°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
142
mm
Sun Hours
10.1
Hrs