Ljubljana
September
Weather in Ljubljana for September 2026
Your guide to Ljubljana weather in September - trends and predictions
Until now, September 2026 in Ljubljana has been nearly identical to the historical average, with a temperature of 24.4 °C (showing only a slight deviation of 0.2 °C).
The forecast for the next days in Ljubljana predicts temperatures to be around 23 °C, close to the historical average.
In general, the average temperature in Ljubljana at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.3 °C by the end of September.
Ljubljana experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 116.7 mm.
Temperatures
Rain 🌧️
9
Dry days
21
Rainy days
0
Snow days
21°/10°
Temperatures
9 km/h
Avg max wind
81 %
Avg humidity
Ljubljana Weather September
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Temperatures trend during September in Ljubljana
See the weather trend as well as the moving average line
September weather in Ljubljana day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 26° /13° | 0 mm | 6 | |
| 2 Sept. |  Patchy rain possible | 26° /14° | 0.5 mm | 5 | |
| 3 Sept. |  Mist | 26° /13° | 2.2 mm | 6 | |
| 4 Sept. |  Overcast | 26° /13° | 0.2 mm | 6 | |
| 5 Sept. | Sunny | 26° /13° | 3.3 mm | 6 | |
| 6 Sept. | Sunny | 23° /12° | 1.2 mm | 6 | |
| 7 Sept. | Sunny | 25° /12° | 0 mm | 6 | |
| 8 Sept. | Sunny | 27° /13° | 0.1 mm | 6 | |
| 9 Sept. | Sunny | 23° /13° | 5 mm | 5 | |
| 10 Sept. | Sunny | 21° /11° | 39.7 mm | 4 | |
| 11 Sept. | Sunny | 21° /11° | 9.5 mm | 5 | |
| 12 Sept. | Light rain shower | 21° /9° | 23.1 mm | 5 | |
| 13 Sept. | Sunny | 22° /11° | 0 mm | 5.2 | |
| 14 Sept. | Overcast | 24° /14° | 0 mm | 5 | |
| 15 Sept. | Sunny | 23° /13° | 0 mm | 6 | |
| 16 Sept. | Sunny | 25° /13° | 0 mm | 6 | |
| 17 Sept. | Sunny | 20° /13° | 0 mm | 6 | |
| 18 Sept. | Patchy rain possible | 21° /13° | 1.3 mm | 5 | |
| 19 Sept. | Overcast | 22° /13° | 0 mm | 6 | |
| 20 Sept. | Overcast | 24° /15° | 0 mm | 6 | |
| 21 Sept. | Overcast | 24° /16° | 0.6 mm | 6 | |
| 22 Sept. | Overcast | 25° /15° | 0 mm | 6 | |
| 23 Sept. | Sunny | 23° /14° | 0 mm | 6 | |
| 24 Sept. | Sunny | 22° /13° | 0 mm | 6 | |
| 25 Sept. | Sunny | 23° /13° | 0 mm | 6 | |
| 26 Sept. | Fog | 19° /9° | 1 mm | 4 | |
| 27 Sept. |  Partly cloudy | 19° /10° | 1.7 mm | 5 | |
| 28 Sept. | Sunny | 19° /7° | 2.3 mm | 5 | |
| 29 Sept. | Sunny | 18° /7° | 0.2 mm | 5 | |
| 30 Sept. |  Cloudy | 15° /6° | 1.4 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 21° and cooler nights around 10°. 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 116.7 mm is expected in Ljubljana during September, occurring over more than 21 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 9 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 💧
Typically, Ljubljana has 21 rainy days in September with a total of 116.7 mm of rainfall.
UV exposure in Ljubljana during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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