Weather in Split in September 2025
Average weather
Average temperature in Split in September
Going from a maximum of +31°C during the day to a minimum of +17°C during the night, the temperature in September averages around +28°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +27°C to +27°C.
Is Split warm or cold in September?
Split is typically warm in September.
Maximum temperatures go down compared to the previous month from +30°C to +25°C. The minimum temperature also goes down from +21°C to +17°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Split:
Water temperature in Split in September
Water in Split in September is Comfortable. It varies from +21°C to +27°C, with an average of +24°C. This is almost similar to the air temperature, which averages +25°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Split in September?
Climate in Split in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +30°C | +25°C | +21°C | ||||
| Min. temperature | ||||||
| +14°C | +8°C | +3°C | ||||
| Max. temperature | ||||||
| +39°C | +34°C | +28°C | ||||
| Rainfall | ||||||
| 36 mm | 76 mm | 111 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +25°C | +24°C | +20°C | ||||
| Humidity | ||||||
| 52% | 59% | 65% | ||||
| Air pressure | ||||||
| 1012 HPa | 1014 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 21 | 17 | 15 | ||||
| Cloudy days | ||||||
| 1 | 3 | 3 | ||||
| Rainy days | ||||||
| 4 | 5 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +30°C in the day, the average maximum temperature lowers to +25°C. Prepare for more rain. Average rainfall goes from 36 mm to 76 mm. Humidity rises from 52% to 59%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 21 sunny days in August to 17 in September.
October brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Split is gradually decreasing during September, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Split?
Climate Change over Years
The climate in Split in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2022 (+22°C). The driest year was 1989 with only 684 mm of rainfall, and the wettest year was 2010 with 1421 mm.
FAQ
Is September a good time to visit Split?
Can you sunbathe in Split in September?
Can you swim in Split in September?
Is Split rainy in September?
Is it sunny in Split in September?
Other cities in Croatia
Monthly weather in Split
Source of the data
For this page, we’ve looked at the typical weather in Split, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.