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Weather in Rijeka for September 2025

Your guide to Rijeka weather in September - trends and predictions
  • 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.
Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/16°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Rijeka in September average weather

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Temperatures trend during September in Rijeka

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
26° /17° 0 mm 7
2 Sept. Sunny
Sunny
27° /18° 0 mm 7
3 Sept. Overcast
Overcast
26° /18° 0 mm 6
4 Sept. Sunny
Sunny
25° /17° 0 mm 7
5 Sept. Sunny
Sunny
25° /17° 2.4 mm 6
6 Sept. Sunny
Sunny
24° /16° 0.2 mm 6
7 Sept. Sunny
Sunny
26° /16° 0 mm 7
8 Sept. Sunny
Sunny
25° /17° 3 mm 6
9 Sept. Sunny
Sunny
24° /16° 10.1 mm 6
10 Sept. Sunny
Sunny
26° /15° 0.3 mm 6
11 Sept. Sunny
Sunny
24° /16° 0.1 mm 6
12 Sept. Sunny
Sunny
22° /15° 27 mm 5
13 Sept. Partly cloudy
Partly cloudy
18° /13° 4.3 mm 5
14 Sept. Partly cloudy
Partly cloudy
20° /13° 1.2 mm 5
15 Sept. Partly cloudy
Partly cloudy
19° /12° 1.4 mm 5
16 Sept. Sunny
Sunny
21° /13° 0.6 mm 5
17 Sept. Partly cloudy
Partly cloudy
19° /13° 0.3 mm 5
18 Sept. Partly cloudy
Partly cloudy
21° /13° 0 mm 5
19 Sept. Light rain shower
Light rain shower
21° /15° 6.4 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
20° /15° 0.2 mm 5
21 Sept. Light rain shower
Light rain shower
22° /14° 3.2 mm 6
22 Sept. Light rain shower
Light rain shower
21° /15° 10.1 mm 6
23 Sept. Light rain shower
Light rain shower
19° /14° 4 mm 5
24 Sept. Light drizzle
Light drizzle
17° /13° 17.3 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
19° /13° 5.1 mm 4
26 Sept. Sunny
Sunny
22° /15° 2.8 mm 6
27 Sept. Overcast
Overcast
22° /17° 6.6 mm 5
28 Sept. Sunny
Sunny
21° /13° 2 mm 5
29 Sept. Sunny
Sunny
21° /12° 0 mm 6
30 Sept. Partly cloudy
Partly cloudy
21° /11° 0 mm 6
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Important Notice
Our weather forecast for Rijeka in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rijeka forecast closer to your planned date for the most up-to-date weather information.

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

Is September a good time to visit Rijeka?
Yes, September is a good time to traveling to Rijeka, read more about the best time to visit Rijeka.
What are the expected maximum and minimum temperatures in Rijeka during September?
During September, expect a variety of temperatures with highs around 23° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Rijeka during September?
Moderate rainfall is anticipated in Rijeka during September, with a total of 54 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Rijeka during September?
The average wind speed in Rijeka during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

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

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Location coordinates 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.

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