Weather in Banja Luka for September 2025
In general, the average temperature in Banja Luka at the beginning of September is 30.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.3 °C by the end of September.
Banja Luka sees moderate rainfall in September, averaging 7 rainy days.
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Banja Luka in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2 32° | 3 31° | 4  30° | 5  30° | 6 30° | 7 30° |
| 8 33° | 9 28° | 10 26° | 11 29° | 12 31° | 13 20° | 14 19° |
| 15  17° | 16 19° | 17 22° | 18 25° | 19 25° | 20 24° | 21 25° |
| 22 26° | 23 22° | 24 19° | 25  17° | 26 25° | 27 27° | 28 22° |
| 29 19° | 30 20° |
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Temperatures trend during September in Banja Luka
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 31° /14° | 0 mm | 8 | |
| 2 Sept. | Sunny | 32° /15° | 0 mm | 8 | |
| 3 Sept. | Sunny | 31° /14° | 0.1 mm | 7 | |
| 4 Sept. | Light rain shower | 30° /13° | 1 mm | 7 | |
| 5 Sept. | Partly cloudy | 30° /11° | 1.4 mm | 7 | |
| 6 Sept. | Sunny | 30° /12° | 1.4 mm | 7 | |
| 7 Sept. | Sunny | 30° /12° | 0 mm | 8 | |
| 8 Sept. | Sunny | 33° /13° | 0.8 mm | 8 | |
| 9 Sept. | Sunny | 28° /12° | 4.6 mm | 7 | |
| 10 Sept. | Sunny | 26° /11° | 0.3 mm | 7 | |
| 11 Sept. | Sunny | 29° /10° | 0 mm | 8 | |
| 12 Sept. | Sunny | 31° /10° | 0.8 mm | 7 | |
| 13 Sept. | Partly cloudy | 20° /9° | 15.7 mm | 5 | |
| 14 Sept. | Partly cloudy | 19° /9° | 1.5 mm | 5 | |
| 15 Sept. | Mist | 17° /9° | 11.1 mm | 4 | |
| 16 Sept. | Partly cloudy | 19° /8° | 10.4 mm | 5 | |
| 17 Sept. | Partly cloudy | 22° /10° | 1.1 mm | 6 | |
| 18 Sept. | Sunny | 25° /10° | 0.2 mm | 6 | |
| 19 Sept. | Light rain shower | 25° /11° | 1.5 mm | 6 | |
| 20 Sept. | Partly cloudy | 24° /10° | 0.7 mm | 6 | |
| 21 Sept. | Patchy rain possible | 25° /10° | 0.3 mm | 6 | |
| 22 Sept. | Sunny | 26° /10° | 0.7 mm | 7 | |
| 23 Sept. | Light rain shower | 22° /11° | 27.3 mm | 6 | |
| 24 Sept. | Light rain shower | 19° /10° | 13.6 mm | 4 | |
| 25 Sept. | Light drizzle | 17° /10° | 2.4 mm | 4 | |
| 26 Sept. | Patchy rain possible | 25° /10° | 0 mm | 6 | |
| 27 Sept. | Sunny | 27° /11° | 0 mm | 7 | |
| 28 Sept. | Sunny | 22° /9° | 20.9 mm | 6 | |
| 29 Sept. | Sunny | 19° /7° | 6.7 mm | 5 | |
| 30 Sept. | Partly cloudy | 20° /6° | 0 mm | 6 | |
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Guide for Banja Luka in September
In Banja Luka, Bosnia and Herzegovina, September marks the transition from summer to autumn, bringing about noticeable changes in the weather.
At the beginning of the month, the weather in Banja Luka is generally warm and pleasant, with average daytime temperatures around 24° and occasional showers.
As the month progresses, the temperatures gradually begin to decrease, and by the end of September, the weather becomes cooler with average daytime temperatures around 18°. The evenings and nights tend to be cooler, with temperatures dropping to around 10° towards the end of the month.
The weather in Banja Luka during September is characterized by decreasing daylight hours and a gradual shift towards autumnal conditions.
Travelers visiting Banja Luka during this time can expect comfortable weather for outdoor activities at the beginning of the month, while towards the end, they may need to pack some warmer clothing for the cooler evenings.
Overall, September in Banja Luka offers a pleasant transition from summer to autumn, allowing visitors to enjoy the changing colors of the surrounding nature and the cultural attractions of the city.
Banja Luka in September - FAQ
What to pack to Banja Luka in September?
As you prepare for your trip to Banja Luka in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Banja Luka, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Banja Luka
UV exposure in Banja Luka during September
Quick links
Where is Banja Luka?Get accurate weather forecasts for Banja Luka, located at latitude 44.778 and longitude 17.194. Stay updated with localized weather information tailored for Banja Luka.