Portorož weather in September (Carinthia, Slovenia)

Planning a trip to Portorož in September? Check out this comprehensive weather guide.

In September, Portorož generally has high temperatures and high rainfall. Anticipate daytime temperatures around 24°C, while night temperatures can drop to 18°C.

Portorož in September usually receives high rainfall, averaging around 154 mm for the month. When we look at the climate data from the last 30 years, we can expect around 11 days of rain.

The days are predominantly sunny, with an estimated total of around 223 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

In case you lean more towards enjoying temperate temperatures and rain-free days May, June, July and August typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Portorož climate page with graphs.

 

Portorož, monthly averages in September

Min Temperature 18°C  

Max Temperature 24°C  

Chance of Rain 36%  

Precipitation 154 mm  

Rainy days 11 days  

Humidity 57%  

Sunshine 223 hours  

Percentage Sunshine  

Where to go in Slovenia in September

Find out more about the weather in Slovenia in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Portorož in September?

For visitors traveling to Portorož, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming

8/10

Camping

6/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Portorož.

Our site offers climate and forecast data for every country in the world. Are you going to Slovenia? On this website you can find historical weather averages for many cities in Slovenia. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.