Weather in Split for September 2025
Until now, September 2025 in Split is slightly cooler than the historical average by -1 °C.
Expect cooler weather in the next days in Split with the forecast suggesting a temperature of 23 °C, lower than the historical average.
In general, the average temperature in Split at the beginning of September is 26.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.
Split in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 83.1 mm.
Is September a good time to visit Split? check out the best time to travel to Split page.
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Split Weather September
Temperatures trend during September in Split
September weather in Split day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 26° /19° | 0.7 mm | 7 | |
| 2 Sept. | Sunny | 27° /19° | 0.1 mm | 7 | |
| 3 Sept. | Sunny | 26° /19° | 0.3 mm | 6 | |
| 4 Sept. |  Partly cloudy | 26° /19° | 0.8 mm | 7 | |
| 5 Sept. | Sunny | 27° /19° | 1.5 mm | 7 | |
| 6 Sept. | Sunny | 29° /19° | 2.5 mm | 7 | |
| 7 Sept. | Sunny | 26° /19° | 0 mm | 7 | |
| 8 Sept. | Sunny | 27° /20° | 0.1 mm | 7 | |
| 9 Sept. | Partly cloudy | 26° /19° | 5.6 mm | 6 | |
| 10 Sept. | Sunny | 26° /19° | 2 mm | 6 | |
| 11 Sept. | Sunny | 26° /18° | 0.9 mm | 7 | |
| 12 Sept. | Sunny | 25° /18° | 2.5 mm | 7 | |
| 13 Sept. | Sunny | 25° /17° | 3.8 mm | 7 | |
| 14 Sept. | Sunny | 24° /18° | 0.2 mm | 6 | |
| 15 Sept. | Sunny | 26° /17° | 0 mm | 1.4 | |
| 16 Sept. |  Patchy rain possible | 26° /19° | 0.2 mm | 1.4 | |
| 17 Sept. | Patchy rain possible | 25° /16° | 4.7 mm | 1.3 | |
| 18 Sept. | Sunny | 26° /14° | 0 mm | 1.4 | |
| 19 Sept. | Sunny | 25° /15° | 0 mm | 1.7 | |
| 20 Sept. | Sunny | 25° /17° | 0 mm | 6 | |
| 21 Sept. | Sunny | 25° /18° | 0 mm | 6 | |
| 22 Sept. | Sunny | 25° /18° | 0 mm | 6 | |
| 23 Sept. | Sunny | 25° /17° | 0 mm | 6 | |
| 24 Sept. | Sunny | 24° /18° | 0 mm | 6 | |
| 25 Sept. | Patchy rain possible | 22° /17° | 2.7 mm | 4 | |
| 26 Sept. | Partly cloudy | 22° /16° | 0.1 mm | 5 | |
| 27 Sept. | Patchy rain possible | 17° /11° | 4.1 mm | 3 | |
| 28 Sept. | Patchy rain possible | 9° /7° | 2.3 mm | 2 | |
| 29 Sept. | Sunny | 22° /16° | 3.4 mm | 5 | |
| 30 Sept. |  Cloudy | 22° /16° | 3.7 mm | 6 | |
| Next | |||||
Split weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 29°/22° | 24°/18° | 21°/15° |
| Rainfall | 46 mm | 83 mm | 74 mm |
| Wind | 17.1 km/h | 18.4 km/h | 17.4 km/h |
| Humidity | 55% | 60% | 64% |
| Rainy days | 11 days | 20 days | 18 days |
| Dry days | 20 days | 10 days | 13 days |
Planning a trip to Split? Discover the best time to visit
Guide for Split in September
In September, Split, Croatia experiences pleasant weather with warm temperatures and plenty of sunshine. At the beginning of the month, the average temperature hovers around 25°, making it ideal for outdoor activities and sightseeing.
The sea temperature remains inviting for swimming and water sports, typically around 23°. The city enjoys approximately 9 hours of sunshine per day, providing ample opportunity to explore the stunning coastal landscapes and historical sites.
As the month progresses, the temperatures gradually begin to decrease, with average highs of around 23° and cooler evenings with lows of about 17°. Despite this slight drop in temperature, the weather remains comfortable for outdoor excursions and al fresco dining.
The sea temperature also begins to decrease slightly, but it still remains pleasant for swimming and other water activities.
Overall, September in Split offers a delightful transition from the hot summer months to the cooler autumn season. Visitors can expect enjoyable weather conditions for exploring the city's attractions, indulging in local cuisine, and soaking up the Mediterranean ambiance along the Adriatic coast.
Split in September - FAQ
Split water temperatures in September
The average water temperature of the Adriatic Sea near Split in September is 21.8 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Split in September?
- The average water temperature in Split in September is 21.8 °C.
- Can you swim in Split in September?
- Comfortably warm for most people. Sensitive swimmers might prefer a light rash-guard, but wetsuits are rarely needed.
What to pack to Split in September?
As you prepare for your trip to Split 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 Split, 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 Split
UV exposure in Split during September
Quick links
Where is Split?Get accurate weather forecasts for Split, located at latitude 43.509 and longitude 16.439. Stay updated with localized weather information tailored for Split.