Kostrena Weather in September

September in Kostrena brings pleasant temperatures, with highs of 21°C (70°F) and nights dropping to 13°C (55°F). The rainy season is in full swing this month, so frequent downpours are part of the picture.

Rainfall in Kostrena in September

Kostrena is in the rainy season in September, with rain on around 13 days and an average of 185 mm (7.3 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Kostrena in September

In September, Kostrena sees pleasant temperatures, with highs of 21°C (70°F). Nights drop to around 13°C (55°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 13°C (55°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Kostrena in September

The city usually sees around 202 hours of sunlight, indicating many sunny days despite it being the rainy season.

Average water temperature in September

The water temperature is 24°C (75°F), which most people find very comfortable. A good month for swimming and water sports.

If your ideal day consists of dry skies and pleasant temperatures, July typically offers the best circumstances for Kostrena.

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For a detailed overview over the year and the best time to visit Croatia, check out our Kostrena's climate page.

Kostrena Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 21°C (70°F)  

Water Temperature 24°C (75°F) *  

Chance of Rain 42%  

Precipitation 185 mm (7.3 in)  

Rainy days 13 days  

Humidity 64% *  

Sunshine 202 hours *  

Percentage Sunshine 57% *  

* Data from: Rijeka, Croatia (7 KM, 4 Miles).

What to Wear in Kostrena in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With water temperatures around 24°C (75°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Kostrena in September

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

Swimming

7/10

Camping

6/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Croatia, check out our Kostrena's climate page.

More climate data for Kostrena

Temperature Rainfall Sunshine Humidity Water Temp

See the full Kostrena climate overview or explore weather in Croatia.