Piran-Pirano (Portorož)
September
Weather in Piran-Pirano for September 2026
Your guide to Piran-Pirano weather in September - trends and predictions
Yellow Wind Warning - See hour by hour.
So far, September 2026 in Piran-Pirano is slightly warmer than the historical average by 1.4 °C.
Expect cooler weather in the next days in Piran-Pirano with the forecast suggesting a temperature of 25.9 °C, lower than the historical average.
In general, the average temperature in Piran-Pirano at the beginning of September is 29.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.4 °C by the end of September.
Piran-Pirano in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 156.7 mm.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
12
Dry days
18
Rainy days
0
Snow days
23°/14°
Temperatures
12 km/h
Avg max wind
72 %
Avg humidity
Piran-Pirano Weather September
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Temperatures trend during September in Piran-Pirano
See the weather trend as well as the moving average line
September weather in Piran-Pirano day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 30° /19° | 0.1 mm | 7 | |
| 2 Sept. |  Sunny | 29° /18° | 3.7 mm | 7 | |
| 3 Sept. |  Patchy rain possible | 29° /18° | 0.7 mm | 6 | |
| 4 Sept. | Sunny | 30° /18° | 0.1 mm | 6 | |
| 5 Sept. | Patchy rain possible | 30° /19° | 2.6 mm | 7 | |
| 6 Sept. |  Patchy light rain with thunder | 28° /17° | 2.5 mm | 6 | |
| 7 Sept. | Sunny | 28° /16° | 0 mm | 6 | |
| 8 Sept. | Light rain shower | 28° /17° | 2.7 mm | 6 | |
| 9 Sept. | Light rain shower | 25° /16° | 14.5 mm | 4 | |
| 10 Sept. |  Moderate or heavy rain shower | 23° /15° | 40.5 mm | 4 | |
| 11 Sept. | Partly cloudy | 23° /15° | 20.3 mm | 4 | |
| 12 Sept. | Moderate or heavy rain shower | 22° /12° | 27.8 mm | 5 | |
| 13 Sept. | Sunny | 24° /14° | 0 mm | 5.1 | |
| 14 Sept. |  Overcast | 26° /16° | 0 mm | 4 | |
| 15 Sept. | Sunny | 24° /14° | 0 mm | 5.6 | |
| 16 Sept. | Sunny | 26° /17° | 0 mm | 5.6 | |
| 17 Sept. | Patchy rain possible | 24° /16° | 4.6 mm | 5.1 | |
| 18 Sept. | Light rain shower | 23° /17° | 17.1 mm | 5 | |
| 19 Sept. | Sunny | 25° /16° | 2.1 mm | 6 | |
| 20 Sept. | Sunny | 26° /16° | 0 mm | 6 | |
| 21 Sept. | Overcast | 27° /18° | 0 mm | 7 | |
| 22 Sept. | Sunny | 26° /15° | 0 mm | 7 | |
| 23 Sept. | Patchy rain possible | 28° /14° | 0.1 mm | 6 | |
| 24 Sept. | Sunny | 28° /17° | 0 mm | 7 | |
| 25 Sept. | Sunny | 28° /17° | 0 mm | 7 | |
| 26 Sept. | Sunny | 28° /16° | 0 mm | 7 | |
| 27 Sept. | Light rain shower | 22° /14° | 4.6 mm | 5 | |
| 28 Sept. | Patchy rain possible | 21° /11° | 1.5 mm | 5 | |
| 29 Sept. | Patchy rain possible | 20° /10° | 0.4 mm | 5 | |
| 30 Sept. | Partly cloudy | 17° /9° | 0.3 mm | 5 | |
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Important Notice
Our weather forecast for Piran-Pirano 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 Piran-Pirano forecast closer to your planned date for the most up-to-date weather information.
Change Month
Piran-Pirano in September - FAQ
What are the expected maximum and minimum temperatures in Piran-Pirano during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Piran-Pirano during September?
Significant rainfall exceeding 156.7 mm is expected in Piran-Pirano during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Piran-Pirano during September?
The average wind speed in Piran-Pirano during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Piran-Pirano
Explore the daily rainfall trends and prepare for Piran-Piranos September weather 💧
Typically, Piran-Pirano has 18 rainy days in September with a total of 156.7 mm of rainfall.
UV exposure in Piran-Pirano during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Piran-Pirano?Get accurate weather forecasts for Piran-Pirano, located at latitude 45.514 and longitude 13.592. Stay updated with localized weather information tailored for Piran-Pirano.
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