The temperatures in Mostar in September are quite cold with temperatures between 7°C and 25°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Mostar 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 Mostar in September 2025.
If you’re planning to visit Mostar in the near future, we highly recommend that you review the 14 day weather forecast for Mostar before you arrive.
Temperatures
25° / 7°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
139
mm
Sun Hours
11.4
Hrs
