The temperatures in Banja Luka in September are quite cold with temperatures between 9°C and 23°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Banja Luka 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 Banja Luka in September 2026.
If you’re planning to visit Banja Luka in the near future, we highly recommend that you review the 14 day weather forecast for Banja Luka before you arrive.
Temperatures
23° / 9°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
101
mm
Sun Hours
7.9
Hrs
