Banja Luka weather in September
September in Banja Luka: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Banja Luka · #58 of 897 destinations to visit in September · comfort 93/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Banja Luka in September
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Banja Luka climate normals — September
| Daytime high | 24°C / 75°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Rainfall | 60 mm / 2.4 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 14°C / 57°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12.5 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Banja Luka in September — FAQ
- Is September a good time to visit Banja Luka?
- September in Banja Luka: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Banja Luka on SeasonMap's comfort score (93/100).
- What is the weather like in Banja Luka in September?
- In September, Banja Luka averages a daily high of 23.7°C and a low of 12.9°C, with about 60 mm of rain over roughly 9.8 rainy days.
- What is the air quality in Banja Luka in September?
- Banja Luka has a mean US Air Quality Index of about 42 in September.