September weather forecast
Bosnia and Herzegovina

September signals the onset of autumn in Bosnia and Herzegovina, offering a mix of warm days and cooler nights, coupled with a gradual increase in rainfall.

High-altitude regions, including Igman, begin to see more noticeable temperature drops in September. While the days can still be warm, nights become noticeably cooler, a clear indication of the impending autumn season.

In Herzegovina, the southern region of the country, the summer heat starts to recede. Cities like Mostar experience a significant decrease in temperatures compared to the summer peak, yet the weather remains comfortably warm, making September an ideal time for visitors who prefer milder conditions.

Rainfall begins to rise in September, with the dry summer giving way to the wetter autumn. Rain showers become more frequent, although they are typically interspersed with clear, sunny periods.

Sunlight hours continue to decrease in September as the country moves further away from the summer solstice. Nonetheless, the country still enjoys a good amount of sunshine, particularly in the southern regions.

Humidity levels fluctuate between 55% and 85%, consistent with previous months. However, the combination of decreasing temperatures and consistent humidity gives the air a crispness, particularly in the mornings and evenings.

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• Sarajevo - September »
  In Sarajevo snow does not fall in June through September. In September, in Sarajevo the rain falls for 15 days.
• Banja Luka - September »
  In Banja Luka during September, the rain falls for 13.2 days and regularly aggregates up to 44mm (1.73") of precipitation. On the first day of September in Banja Luka, Bosnia and Herzegovina, sunrise is at 06:14 and sunset at 19:28.
• Tuzla - September »
  On the first day of September in Tuzla, Bosnia and Herzegovina, sunrise is at 06:08 and sunset at 19:21. In Tuzla during September, the rain falls for 8 days and regularly aggregates up to 70mm (2.76") of precipitation.
• Zenica - September »
  The month with the least rainfall in Zenica is September, when the rain falls for 12.4 days and typically collects 34mm (1.34") of precipitation. In Zenica during September, the rain falls for 12.4 days and regularly aggregates up to 34mm (1.34") of precipitation.
• Mostar - September »
  In Mostar during September, the rain falls for 11.8 days and regularly aggregates up to 54mm (2.13") of precipitation. In Mostar the average relative humidity in September is 70%.
• Bijeljina - September »
  In Bijeljina during September, the rain falls for 9.4 days and regularly aggregates up to 25mm (0.98") of precipitation. September witnesses the onset of fall in the city of Bijeljina, with temperatures experiencing a noticeable drop from the August highs.
• Prijedor - September »
  The month with the least rainfall in Prijedor is September, when the rain falls for 10.2 days and typically collects 27mm (1.06") of precipitation. The month with the least rainfall in Prijedor is September, when the rain falls for 10.2 days and typically collects 27mm (1.06") of precipitation.
• Brčko - September »
  The month with the least rainfall in Brčko is September, when the rain falls for 10 days and typically collects 27mm (1.06") of precipitation. In Brčko during September, the rain falls for 10 days and regularly aggregates up to 27mm (1.06") of precipitation.
• Doboj - September »
  In Doboj in September, it is raining for 11.5 days, with typically 38mm (1.5") of accumulated precipitation. In Doboj snow does not fall in May through September.
• Cazin - September »
  In Cazin snow does not fall in May through September. In September, in Cazin the rain falls for 13.8 days.
• Bihać - September »
  In Bihać in September, it is raining for 13.8 days, with typically 78mm (3.07") of accumulated precipitation. September brings milder weather conditions in Bihać, Bosnia and Herzegovina as the city transitions from summer to autumn.