The temperatures in Novo Mesto in September are quite cold with temperatures between 9°C and 22°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Novo Mesto 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 Novo Mesto in September 2025.
If you’re planning to visit Novo Mesto in the near future, we highly recommend that you review the 14 day weather forecast for Novo Mesto before you arrive.
Temperatures
22° / 9°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
151
mm
Sun Hours
10.3
Hrs
