Weather in Karlovac for September 2026
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Until now, September 2026 in Karlovac has been nearly identical to the historical average, with a temperature of 28.5 °C (showing only a slight deviation of 0.2 °C).
Expect cooler weather in the next days in Karlovac with the forecast suggesting a temperature of 25.8 °C, lower than the historical average.
In general, the average temperature in Karlovac at the beginning of September is 29.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.9 °C by the end of September.
Karlovac experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 90.5 mm.
Is September a good time to visit Karlovac? check out the best time to travel to Karlovac page.
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Karlovac Weather September
Temperatures trend during September in Karlovac
September weather in Karlovac day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 29° /14° | 0 mm | 7 | |
| 2 Sept. |  Overcast | 31° /14° | 0.6 mm | 7 | |
| 3 Sept. | Sunny | 29° /15° | 0.3 mm | 7 | |
| 4 Sept. |  Partly cloudy | 30° /14° | 0 mm | 7 | |
| 5 Sept. | Sunny | 30° /14° | 0.6 mm | 7 | |
| 6 Sept. | Sunny | 27° /13° | 0.6 mm | 6 | |
| 7 Sept. | Sunny | 29° /13° | 0 mm | 7 | |
| 8 Sept. | Sunny | 31° /13° | 0 mm | 7 | |
| 9 Sept. |  Patchy rain possible | 28° /13° | 6.6 mm | 5 | |
| 10 Sept. | Sunny | 23° /13° | 11.8 mm | 4 | |
| 11 Sept. | Sunny | 25° /12° | 3.9 mm | 6 | |
| 12 Sept. | Sunny | 26° /11° | 8.9 mm | 6 | |
| 13 Sept. | Sunny | 26° /11° | 0 mm | 5.2 | |
| 14 Sept. | Overcast | 28° /14° | 0 mm | 2.8 | |
| 15 Sept. | Sunny | 27° /13° | 0 mm | 5.5 | |
| 16 Sept. | Sunny | 30° /13° | 0 mm | 5.6 | |
| 17 Sept. | Sunny | 28° /14° | 0.3 mm | 7 | |
| 18 Sept. | Light rain shower | 20° /13° | 8.3 mm | 5 | |
| 19 Sept. | Partly cloudy | 24° /16° | 2.3 mm | 6 | |
| 20 Sept. | Overcast | 27° /15° | 0 mm | 6 | |
| 21 Sept. | Sunny | 26° /16° | 0 mm | 7 | |
| 22 Sept. | Sunny | 21° /12° | 0 mm | 6 | |
| 23 Sept. | Sunny | 27° /11° | 0 mm | 7 | |
| 24 Sept. | Sunny | 25° /14° | 0 mm | 7 | |
| 25 Sept. | Sunny | 26° /14° | 0 mm | 7 | |
| 26 Sept. | Sunny | 26° /12° | 0 mm | 7 | |
| 27 Sept. |  Mist | 25° /12° | 0 mm | 6 | |
| 28 Sept. | Sunny | 20° /9° | 3.8 mm | 5 | |
| 29 Sept. | Sunny | 20° /7° | 1.8 mm | 5 | |
| 30 Sept. | Partly cloudy | 18° /7° | 1.4 mm | 5 | |
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Karlovac weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny |  Cloudy | Cloudy |
| Temperatures | 30°/15° | 24°/12° | 19°/9° |
| Rainfall | 98 mm | 91 mm | 85 mm |
| Wind | 8.7 km/h | 9.6 km/h | 10.8 km/h |
| Humidity | 65% | 73% | 77% |
| Rainy days | 9 days | 9 days | 9 days |
| Dry days | 22 days | 21 days | 23 days |
Planning a trip to Karlovac? Discover the best time to visit
Karlovac in September - FAQ
What are the expected maximum and minimum temperatures in Karlovac during September?
How much rainfall should be expected in Karlovac during September?
What are the typical wind conditions in Karlovac during September?
September rainfall patterns in Karlovac
UV exposure in Karlovac during September
What to pack to Karlovac in September?
Mild & changeable · highs around 24 °C, frequent showers
As you prepare for your trip to Karlovac 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 Karlovac, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
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Where is Karlovac?Get accurate weather forecasts for Karlovac, located at latitude 45.492 and longitude 15.55. Stay updated with localized weather information tailored for Karlovac.