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Weather in Grad Split for September 2025

Your guide to Grad Split weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Yellow Wind Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Grad Split is slightly cooler than the historical average by -0.9 °C.

  • Expect cooler weather in the next days in Grad Split with the forecast suggesting a temperature of 22.9 °C, lower than the historical average.

  • In general, the average temperature in Grad 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.

    • Rain 🌧️

  • Grad Split in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 83.1 mm.

    • More

  • Is September a good time to visit Grad Split? check out the best time to travel to Grad Split page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/18°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
60 %
Avg humidity

Grad Split Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
26°
2
Sunny
27°
3
Sunny
26°
4
Partly cloudy
26°
5
Sunny
27°
6
Sunny
29°
7
Sunny
26°
8
Sunny
27°
9
Partly cloudy
26°
10
Sunny
26°
11
Sunny
26°
12
Sunny
25°
13
Sunny
25°
14
Sunny
24°
15
Partly cloudy
24°
16
Weather Alert Patchy rain possible
26°
17
Weather Alert Patchy rain possible
25°
18
Sunny
25°
19
Sunny
26°
20
Sunny
26°
21
Sunny
26°
22
Sunny
26°
23
Sunny
24°
24
Moderate rain
22°
25
Patchy rain possible
20°
26
Sunny
18°
27
Sunny
18°
28
Sunny
19°
29
Patchy rain possible
19°
30
Cloudy
22°

Temperatures trend during September in Grad Split

See the weather trend as well as the moving average line

September weather in Grad Split day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 26° /19° 0.7 mm 7
2 Sept. Sunny
Sunny
 27° /19° 0.1 mm 7
3 Sept. Sunny
Sunny
 26° /19° 0.3 mm 6
4 Sept. Partly cloudy
Partly cloudy
 26° /19° 0.8 mm 7
5 Sept. Sunny
Sunny
 27° /19° 1.5 mm 7
6 Sept. Sunny
Sunny
 29° /19° 2.5 mm 7
7 Sept. Sunny
Sunny
 26° /19° 0 mm 7
8 Sept. Sunny
Sunny
 27° /20° 0.1 mm 7
9 Sept. Partly cloudy
Partly cloudy
 26° /19° 5.6 mm 6
10 Sept. Sunny
Sunny
 26° /19° 2 mm 6
11 Sept. Sunny
Sunny
 26° /18° 0.9 mm 7
12 Sept. Sunny
Sunny
 25° /18° 2.5 mm 7
13 Sept. Sunny
Sunny
 25° /17° 3.8 mm 7
14 Sept. Sunny
Sunny
 24° /18° 0.2 mm 6
15 Sept. Partly cloudy
Partly cloudy
 24° /18° 1.6 mm 6
16 Sept. Patchy rain possible
Patchy rain possible
 26° /18° 0.4 mm 1.4
17 Sept. Patchy rain possible
Patchy rain possible
 25° /17° 2.2 mm 1.3
18 Sept. Sunny
Sunny
 25° /15° 0 mm 1.4
19 Sept. Sunny
Sunny
 26° /18° 0 mm 1.4
20 Sept. Sunny
Sunny
 26° /18° 0 mm 1.7
21 Sept. Sunny
Sunny
 26° /19° 0 mm 6
22 Sept. Sunny
Sunny
 26° /18° 0 mm 6
23 Sept. Sunny
Sunny
 24° /18° 0 mm 6
24 Sept. Moderate rain
Moderate rain
 22° /18° 15.5 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 20° /10° 3.3 mm 4
26 Sept. Sunny
Sunny
 18° /9° 0 mm 4
27 Sept. Sunny
Sunny
 18° /10° 0 mm 4
28 Sept. Sunny
Sunny
 19° /11° 0 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 19° /14° 1.9 mm 4
30 Sept. Cloudy
Cloudy
 22° /16° 3.7 mm 6
Next
Important Notice
Our weather forecast for Grad Split 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 Grad Split forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Grad Split weather in September vs August vs October

Compare September weather in Grad Split with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherSunny
Sunny
Sunny
Sunny
Sunny
Sunny
Temperatures29°/22°24°/18°21°/15°
Rainfall46 mm83 mm74 mm
Wind17.1 km/h18.4 km/h17.4 km/h
Humidity55%60%64%
Rainy days11 days20 days18 days
Dry days20 days10 days13 days

Planning a trip to Grad Split? Discover the best time to visit

Grad Split in September - FAQ

What are the expected maximum and minimum temperatures in Grad Split during September?
During September, expect a variety of temperatures with highs around 24° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Grad Split during September?
Moderate rainfall is anticipated in Grad Split during September, with a total of 83.1 mm spread over approximately 20 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Grad Split during September?
The average wind speed in Grad Split during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

Grad Split water temperatures in September

The average water temperature of the Adriatic Sea near Grad Split in September is 21.8 °C. Temperatures remain fairly consistent throughout the month.

What is the water temperature in Grad Split in September?
The average water temperature in Grad Split in September is 21.8 °C.
Can you swim in Grad 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 Grad Split in September?

As you prepare for your trip to Grad 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 Grad 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 Grad Split

Explore the daily rainfall trends and prepare for Grad Splits September weather 💧

UV exposure in Grad Split during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Grad Split?

Get accurate weather forecasts for Grad Split, located at latitude 43.509 and longitude 16.439. Stay updated with localized weather information tailored for Grad Split.

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