Normal weather for Portorož in September
It's warm in September in Portorož with an average temperature of 25°C. Temperatures this month range from a low of 22°C to a high of 28°C. At night, you can expect temperatures between 13°C and 18°C.
In September, there is an average of 105 mm of precipitation, spread over 14 days. The wind speed is around 3 Bft, mostly coming from the East.
The water temperature at Portorož is 26°C this month. Lovely temperature for a swim.
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Portorož in September |
London | ||
|---|---|---|---|
 Average Temperature |
25°C | 20°C | |
 High Temp |
28°C | 22°C | |
| Low Temp |
22°C | 17°C | |
 Total Precipitation |
105 mm | 44 mm | |
| Rainy Days |
14 days | 8 days | |
Curious about the climate in other parts of Slovenia? Check out the weather and climate in places like Ljubljana, Bled, Bohinj, or have a look at other destinations in Slovenia.
Start of September
The month of September starts in Portorož with hot temperatures, averaging around 28°C during the day and nights close to 16°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature drops to around 27°C, with nights close to 16°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in Portorož will be around 24°C, with nights close to 14°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
Discover cheap trips to Portorož 
Is September a good time to visit Portorož?
After some sun? Then September isn’t the best time to be in Portorož. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Portorož in September
With 32°C, Portorož hit the highest temperature in the last 10 years in September 2016. The lowest daytime temperature in this month was 14°C in 2017. The extreme night temperatures ranged from a low of 6°C to a high of 24°C.
Check out the climate of Portorož for all months and discover the best travel time
August
Plan your next holiday
Don’t miss the best holiday deals for Portorož and see what our partners have for you.
Daily Temperature in September in Portorož
This chart shows the average daily temperatures, both day and night, for each day in September in Portorož, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Portorož
The chart below shows the average daily precipitation in September for Portorož, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 14 days of rain in Portorož.
Daily UV Index in September in Portorož
This chart shows the average daily UV index in September in Portorož, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Portorož Over the Years
This chart shows the average temperature in September in Portorož, measured in degrees Celsius, over the past years.
Total Precipitation in September in Portorož Over the Years
This chart shows the average precipitation in September in Portorož, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Portorož
Click on a specific day in September for detailed info on the typical weather on that day in Portorož. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Portorož
Have you been to Portorož in September?
Share your weather experience in September in Portorož.
Average Weather in Portorož by Month
Click on a month below to see detailed weather info for Portorož. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
