Ljubljana
September
Weather in Ljubljana for September 2025
Your guide to Ljubljana weather in September - trends and predictions
Moderate Thunderstorm Risk Warning - See hour by hour.
Until now, September 2025 in Ljubljana is slightly cooler than the historical average by -1.5 °C.
Expect cooler weather in the next days in Ljubljana with the forecast suggesting a temperature of 20.5 °C, lower than the historical average.
In general, the average temperature in Ljubljana at the beginning of September is 25.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.4 °C by the end of September.
With an average of 5 rainy days, Ljubljana experiences minimal rainfall in September.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
25
Dry days
5
Rainy days
0
Snow days
24°/8°
Temperatures
10 km/h
Avg max wind
80 %
Avg humidity
Ljubljana Weather September
Move between months or click on a day
Temperatures trend during September in Ljubljana
See the weather trend as well as the moving average line
September weather in Ljubljana day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 27° /13° | 0 mm | 6 | |
| 2 Sept. |  Patchy rain possible | 27° /14° | 0.6 mm | 6 | |
| 3 Sept. | Mist | 25° /13° | 2.9 mm | 6 | |
| 4 Sept. |  Overcast | 25° /12° | 0.3 mm | 6 | |
| 5 Sept. |  Sunny | 26° /12° | 3.7 mm | 6 | |
| 6 Sept. | Sunny | 23° /11° | 1.6 mm | 5 | |
| 7 Sept. | Sunny | 24° /11° | 0 mm | 6 | |
| 8 Sept. | Sunny | 26° /12° | 0.2 mm | 6 | |
| 9 Sept. | Sunny | 23° /12° | 3.8 mm | 5 | |
| 10 Sept. | Sunny | 21° /11° | 23.3 mm | 5 | |
| 11 Sept. | Sunny | 23° /11° | 5.2 mm | 6 | |
| 12 Sept. | Light rain shower | 21° /9° | 23.1 mm | 5 | |
| 13 Sept. |  Partly cloudy | 19° /10° | 4.1 mm | 5 | |
| 14 Sept. | Mist | 19° /10° | 4.1 mm | 4 | |
| 15 Sept. | Partly cloudy | 25° /13° | 0 mm | 1.3 | |
| 16 Sept. |  Moderate rain | 18° /13° | 16.8 mm | 0.4 | |
| 17 Sept. | Patchy rain possible | 18° /12° | 1.1 mm | 1.1 | |
| 18 Sept. | Sunny | 23° /10° | 0 mm | 1.3 | |
| 19 Sept. | Sunny | 25° /12° | 0 mm | 1.5 | |
| 20 Sept. | Sunny | 25° /13° | 0 mm | 5 | |
| 21 Sept. | Sunny | 26° /14° | 0 mm | 5 | |
| 22 Sept. | Sunny | 26° /14° | 0 mm | 5 | |
| 23 Sept. | Patchy rain possible | 23° /14° | 0.2 mm | 4 | |
| 24 Sept. | Moderate rain | 17° /12° | 17.7 mm | 4 | |
| 25 Sept. | Moderate rain | 11° /7° | 11.8 mm | 3 | |
| 26 Sept. | Partly cloudy | 16° /7° | 0 mm | 4 | |
| 27 Sept. | Sunny | 17° /6° | 0 mm | 4 | |
| 28 Sept. |  Cloudy | 17° /7° | 0 mm | 3 | |
| 29 Sept. | Sunny | 19° /7° | 0.2 mm | 5 | |
| 30 Sept. | Cloudy | 18° /6° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Ljubljana 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 Ljubljana forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ljubljana in September - FAQ
What are the expected maximum and minimum temperatures in Ljubljana during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Ljubljana during September?
Significant rainfall exceeding 186.8 mm is expected in Ljubljana during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ljubljana during September?
The average wind speed in Ljubljana during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Ljubljana
Explore the daily rainfall trends and prepare for Ljubljanas September weather 💧
UV exposure in Ljubljana during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Ljubljana weather pages
You are here
Where is Ljubljana?Get accurate weather forecasts for Ljubljana, located at latitude 46.051 and longitude 14.505. Stay updated with localized weather information tailored for Ljubljana.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.