Rijeka Weather in September

Rijeka in September averages 21°C (70°F) during the day and 13°C (55°F) at night. September is part of the rainy season, so frequent rainfall is typical.

Rainfall in Rijeka in September

Rijeka is in the rainy season in September, with rain on around 13 days and an average of 197 mm (7.8 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours.

Temperature in Rijeka in September

September in Rijeka brings pleasant temperatures, with highs of 21°C (70°F) and nights around 13°C (55°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. 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 Rijeka in September

Expect sunny days throughout the month, with an estimated 202 hours of sunshine. Despite being the rainy season, it could still be a nice time to visit. Rain often arrives later in the day, keeping most of the days sunny.

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.

Should you favor a climate that's both dry and comfortably warm, July typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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

Rijeka Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 21°C (70°F)  

Water Temperature 24°C (75°F)  

Chance of Rain 43%  

Precipitation 197 mm (7.8 in)  

Rainy days 13 days  

Humidity 64%  

Sunshine 202 hours  

Percentage Sunshine 57%  

What to Wear in Rijeka in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. The water temperature sits at about 24°C (75°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Rijeka 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 Rijeka's climate page.

More climate data for Rijeka

Temperature Rainfall Sunshine Humidity Water Temp

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