Opatija
September
Weather in Opatija for September 2025
Your guide to Opatija weather in September - trends and predictions
In general, the average temperature in Opatija at the beginning of September is 27.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.3 °C by the end of September.
Opatija in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 277.8 mm.
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Temperatures
Rain 🌧️
More
10
Dry days
20
Rainy days
0
Snow days
21°/14°
Temperatures
15 km/h
Avg max wind
72 %
Avg humidity
Opatija Weather September
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2 30° | 3  28° | 4  28° | 5  26° | 6 23° | 7 25° |
| 8  25° | 9 22° | 10  23° | 11 22° | 12 19° | 13 13° | 14 15° |
| 15 16° | 16 18° | 17 14° | 18 19° | 19 19° | 20 18° | 21 22° |
| 22 21° | 23 20° | 24 18° | 25 18° | 26 20° | 27 20° | 28 19° |
| 29  17° | 30 16° |
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Access Opatija weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Opatija
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 30° /21° | 0 mm | 8 | |
| 2 Sept. | Sunny | 30° /20° | 0 mm | 8 | |
| 3 Sept. | Patchy rain possible | 28° /20° | 0.1 mm | 6 | |
| 4 Sept. | Heavy rain at times | 28° /19° | 1 mm | 6 | |
| 5 Sept. | Moderate or heavy rain shower | 26° /19° | 10.2 mm | 6 | |
| 6 Sept. | Patchy rain possible | 23° /17° | 2.1 mm | 5 | |
| 7 Sept. | Sunny | 25° /17° | 0 mm | 7 | |
| 8 Sept. | Cloudy | 25° /19° | 2.7 mm | 6 | |
| 9 Sept. | Moderate or heavy rain shower | 22° /16° | 32.8 mm | 5 | |
| 10 Sept. | Overcast | 23° /13° | 0 mm | 5 | |
| 11 Sept. | Overcast | 22° /15° | 0 mm | 5 | |
| 12 Sept. | Moderate or heavy rain shower | 19° /12° | 59.9 mm | 4 | |
| 13 Sept. | Moderate or heavy rain shower | 13° /9° | 39.5 mm | 3 | |
| 14 Sept. | Moderate rain at times | 15° /10° | 9.6 mm | 4 | |
| 15 Sept. | Moderate rain at times | 16° /10° | 1.4 mm | 4 | |
| 16 Sept. | Patchy rain possible | 18° /9° | 1.8 mm | 4 | |
| 17 Sept. | Patchy rain possible | 14° /10° | 3.4 mm | 3 | |
| 18 Sept. | Overcast | 19° /11° | 0 mm | 4 | |
| 19 Sept. | Heavy rain at times | 19° /15° | 10.7 mm | 4 | |
| 20 Sept. | Overcast | 18° /14° | 0.5 mm | 4 | |
| 21 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 22 Sept. | Sunny | 21° /12° | 0 mm | 6 | |
| 23 Sept. | Patchy rain possible | 20° /13° | 0.5 mm | 4 | |
| 24 Sept. | Moderate or heavy rain shower | 18° /15° | 30.1 mm | 4 | |
| 25 Sept. | Heavy rain at times | 18° /14° | 11.9 mm | 4 | |
| 26 Sept. | Moderate or heavy rain shower | 20° /15° | 32.7 mm | 5 | |
| 27 Sept. | Heavy rain at times | 20° /17° | 12.1 mm | 5 | |
| 28 Sept. | Patchy rain possible | 19° /12° | 14.2 mm | 4 | |
| 29 Sept. | Partly cloudy | 17° /10° | 0.6 mm | 5 | |
| 30 Sept. | Partly cloudy | 16° /8° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Opatija 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 Opatija forecast closer to your planned date for the most up-to-date weather information.
Opatija in September - FAQ
What are the expected maximum and minimum temperatures in Opatija during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Opatija during September?
Significant rainfall exceeding 277.8 mm is expected in Opatija during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Opatija during September?
The average wind speed in Opatija during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Opatija in September?
As you prepare for your trip to Opatija 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 Opatija, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long 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
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Opatija
Explore the daily rainfall trends and prepare for Opatijas September weather 💧
UV exposure in Opatija during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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