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Weather in Karlovac for September 2025

Your guide to Karlovac weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Moderate Thunderstorm Risk Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Karlovac is slightly cooler than the historical average by -1.6 °C.

  • The forecast for the next days in Karlovac predicts a temperature of 22.6 °C, which is cooler than the historical average.

  • In general, the average temperature in Karlovac at the beginning of September is 29 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.1 °C by the end of September.

    • Rain 🌧️

  • Karlovac in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 109.5 mm.

    • More

  • Is September a good time to visit Karlovac? check out the best time to travel to Karlovac page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
12
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/12°
Temperatures
Average wind speed
10 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Karlovac Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Mist
30°
2
Overcast
31°
3
Sunny
28°
4
Partly cloudy
29°
5
Partly cloudy
30°
6
Sunny
27°
7
Sunny
28°
8
Sunny
30°
9
Sunny
27°
10
Sunny
24°
11
Sunny
28°
12
Sunny
26°
13
Partly cloudy
22°
14
Thundery outbreaks possible
23°
15
Weather Alert Sunny
28°
16
Weather Alert Patchy rain possible
24°
17
Moderate rain
21°
18
Sunny
25°
19
Sunny
27°
20
Sunny
27°
21
Sunny
29°
22
Sunny
29°
23
Sunny
29°
24
Patchy rain possible
26°
25
Overcast
17°
26
Overcast
14°
27
Patchy rain possible
12°
28
Patchy rain possible
9°
29
Sunny
21°
30
Partly cloudy
21°

Temperatures trend during September in Karlovac

See the weather trend as well as the moving average line

September weather in Karlovac day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 30° /13° 0 mm 7
2 Sept. Overcast
Overcast
 31° /14° 0.5 mm 7
3 Sept. Sunny
Sunny
 28° /15° 0.5 mm 7
4 Sept. Partly cloudy
Partly cloudy
 29° /14° 0 mm 7
5 Sept. Partly cloudy
Partly cloudy
 30° /13° 0.8 mm 7
6 Sept. Sunny
Sunny
 27° /13° 0.8 mm 6
7 Sept. Sunny
Sunny
 28° /12° 0 mm 7
8 Sept. Sunny
Sunny
 30° /12° 0 mm 7
9 Sept. Sunny
Sunny
 27° /13° 8 mm 6
10 Sept. Sunny
Sunny
 24° /13° 8.1 mm 5
11 Sept. Sunny
Sunny
 28° /12° 0 mm 7
12 Sept. Sunny
Sunny
 26° /11° 8.9 mm 6
13 Sept. Partly cloudy
Partly cloudy
 22° /11° 9.9 mm 5
14 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 23° /11° 2.7 mm 5
15 Sept. Sunny
Sunny
 28° /13° 0 mm 1.3
16 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 2.3 mm 0.6
17 Sept. Moderate rain
Moderate rain
 21° /11° 6.7 mm 1.2
18 Sept. Sunny
Sunny
 25° /11° 0 mm 1.3
19 Sept. Sunny
Sunny
 27° /12° 0 mm 1.6
20 Sept. Sunny
Sunny
 27° /12° 0 mm 5
21 Sept. Sunny
Sunny
 29° /12° 0 mm 5
22 Sept. Sunny
Sunny
 29° /14° 0 mm 6
23 Sept. Sunny
Sunny
 29° /15° 0 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 26° /13° 1.7 mm 4
25 Sept. Overcast
Overcast
 17° /12° 0 mm 3
26 Sept. Overcast
Overcast
 14° /11° 0 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 12° /7° 2.1 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 9° /5° 3.1 mm 2
29 Sept. Sunny
Sunny
 21° /7° 2.7 mm 5
30 Sept. Partly cloudy
Partly cloudy
 21° /7° 0 mm 6
Next
Important Notice
Our weather forecast for Karlovac in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Karlovac forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Karlovac weather in September vs August vs October

Compare September weather in Karlovac with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Sunny
Sunny
Cloudy
Cloudy
Temperatures30°/16°24°/12°20°/10°
Rainfall128 mm109 mm88 mm
Wind8.9 km/h10.5 km/h10.6 km/h
Humidity67%73%77%
Rainy days15 days18 days15 days
Dry days16 days12 days16 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?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Karlovac during September?
Significant rainfall exceeding 109.5 mm is expected in Karlovac during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Karlovac during September?
The average wind speed in Karlovac during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Karlovac in September?

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
    • Warm Clothing: Sweaters, hoodies, long pants
    • 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

September rainfall patterns in Karlovac

Explore the daily rainfall trends and prepare for Karlovacs September weather 💧

UV exposure in Karlovac during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in Karlovac
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Location coordinates 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.

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