Weather in Rijeka for September 2025
In general, the average temperature in Rijeka at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.
Rijeka sees moderate rainfall in September, averaging 6 rainy days.
Is September a good time to visit Rijeka? check out the best time to travel to Rijeka page.
- New! Chat with our AI weatherman - it’s amazing and free.
Rijeka in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  27° | 3  26° | 4 25° | 5 25° | 6 24° | 7 26° |
| 8 25° | 9 24° | 10 26° | 11 24° | 12 22° | 13 18° | 14 20° |
| 15 19° | 16 21° | 17 19° | 18 21° | 19  21° | 20 20° | 21 22° |
| 22 21° | 23 19° | 24  17° | 25 19° | 26 22° | 27 22° | 28 21° |
| 29 21° | 30 21° |
You can click on date
Temperatures trend during September in Rijeka
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 26° /17° | 0 mm | 7 | |
| 2 Sept. | Sunny | 27° /18° | 0 mm | 7 | |
| 3 Sept. | Overcast | 26° /18° | 0 mm | 6 | |
| 4 Sept. | Sunny | 25° /17° | 0 mm | 7 | |
| 5 Sept. | Sunny | 25° /17° | 2.4 mm | 6 | |
| 6 Sept. | Sunny | 24° /16° | 0.2 mm | 6 | |
| 7 Sept. | Sunny | 26° /16° | 0 mm | 7 | |
| 8 Sept. | Sunny | 25° /17° | 3 mm | 6 | |
| 9 Sept. | Sunny | 24° /16° | 10.1 mm | 6 | |
| 10 Sept. | Sunny | 26° /15° | 0.3 mm | 6 | |
| 11 Sept. | Sunny | 24° /16° | 0.1 mm | 6 | |
| 12 Sept. | Sunny | 22° /15° | 27 mm | 5 | |
| 13 Sept. | Partly cloudy | 18° /13° | 4.3 mm | 5 | |
| 14 Sept. | Partly cloudy | 20° /13° | 1.2 mm | 5 | |
| 15 Sept. | Partly cloudy | 19° /12° | 1.4 mm | 5 | |
| 16 Sept. | Sunny | 21° /13° | 0.6 mm | 5 | |
| 17 Sept. | Partly cloudy | 19° /13° | 0.3 mm | 5 | |
| 18 Sept. | Partly cloudy | 21° /13° | 0 mm | 5 | |
| 19 Sept. | Light rain shower | 21° /15° | 6.4 mm | 5 | |
| 20 Sept. | Patchy rain possible | 20° /15° | 0.2 mm | 5 | |
| 21 Sept. | Light rain shower | 22° /14° | 3.2 mm | 6 | |
| 22 Sept. | Light rain shower | 21° /15° | 10.1 mm | 6 | |
| 23 Sept. | Light rain shower | 19° /14° | 4 mm | 5 | |
| 24 Sept. | Light drizzle | 17° /13° | 17.3 mm | 4 | |
| 25 Sept. | Patchy rain possible | 19° /13° | 5.1 mm | 4 | |
| 26 Sept. | Sunny | 22° /15° | 2.8 mm | 6 | |
| 27 Sept. | Overcast | 22° /17° | 6.6 mm | 5 | |
| 28 Sept. | Sunny | 21° /13° | 2 mm | 5 | |
| 29 Sept. | Sunny | 21° /12° | 0 mm | 6 | |
| 30 Sept. | Partly cloudy | 21° /11° | 0 mm | 6 | |
| Next | |||||
Guide for Rijeka in September
In September, Rijeka, Croatia experiences a transition from the warm summer weather to the cooler temperatures of autumn. At the beginning of the month, Rijeka typically enjoys pleasant temperatures around 24°, with plenty of sunshine and minimal rainfall.
The Adriatic Sea also remains warm, making it an ideal time for beach activities and water sports.
As the month progresses, the weather in Rijeka gradually cools down. By the end of September, temperatures tend to drop to around 20°, signaling the arrival of autumn. While the sea remains relatively warm, the city experiences more frequent rainfall and slightly overcast skies.
However, the weather is still generally mild, making it a great time to explore the city's cultural attractions and enjoy outdoor activities.
Overall, September in Rijeka offers a mix of summer and autumn weather, providing visitors with the opportunity to enjoy the last remnants of summer while also experiencing the changing seasons.
Whether you prefer beach days or sightseeing, Rijeka's September weather caters to a variety of interests.
Rijeka in September - FAQ
What to pack to Rijeka in September?
As you prepare for your trip to Rijeka in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Rijeka, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Rijeka
UV exposure in Rijeka during September
Quick links
Where is Rijeka?Get accurate weather forecasts for Rijeka, located at latitude 45.327 and longitude 14.442. Stay updated with localized weather information tailored for Rijeka.