Portorož weather in September (Carinthia, Slovenia)

How does the weather in Portorož usually fare in September? See what weather conditions to anticipate this month with our guide.

Temperatures

In September, Portorož typically experiences high temperatures and high rainfall. Expect daytime highs to reach approximately 24°C, with nighttime lows dipping to around 18°C.

Precipitation

Portorož in September usually receives high rainfall, averaging around 154 mm for the month. Climate statistics over the past 30 years suggest around 11 days of rain.

Average sunshine

The days are predominantly sunny, with an estimated total of around 223 hours of sunshine. These sun-filled days are perfect for spending time outside. Whether it's playing sports, visiting a park, or going for a bike ride.

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 and which places have the best travel 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 this month?

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.

Swimming

8/10

Camping

6/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.