Split
Croatia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Split, Croatia

An aerial panorama of Split, Croatia with the view of the Dalmatia waterfront and a distant mountain
An aerial panorama of Split, Croatia with the view of the Dalmatia waterfront and a distant mountain
September, the first month of the autumn, in Split, is also a moderately hot month, with average temperature fluctuating between 18.1°C (64.6°F) and 25.1°C (77.2°F).

Temperature

In September, the average high-temperature marginally drops, from a warm 29.5°C (85.1°F) in August, to a still moderately hot 25.1°C (77.2°F). In Split, the average low-temperature is 18.1°C (64.6°F).

Rainfall

In September, the rain falls for 7 days. Throughout September, 71.9mm (2.8") of precipitation is accumulated. Throughout the year, there are 110 rainfall days, and 815.6mm (32.1") of precipitation is accumulated.

Snowfall

In Split snow does not fall in March through December.

Sea temperature

In September, the average sea temperature is 23.8°C (74.8°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23.8°C (74.8°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)

Daylight

The average length of the day in September is 12.5h.

Sunshine

The average sunshine in Split is 8.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Split?

The average high-temperature, in September, in Split, Croatia, is 25.1°C (77.2°F), while the average low-temperature is 18.1°C (64.6°F).

How many days does it rain in September in Split?

In Split, Croatia, in September, it is raining for 7 days, with typically 71.9mm (2.8") of accumulated precipitation.

When it does not snow in Split?

March through December are months without snowfall in Split, Croatia.

What is the water temperature in September in Split?

In Split, Croatia, the average seawater temperature in September is 23.8°C (74.8°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23.8°C (74.8°F) water may be enjoyable.

How many hours of daylight does Split have in September?

In Split, Croatia, the average length of the day in September is 12.5h.

How many hours of sunshine does Split have in September?

In Split, Croatia, the average sunshine in September is 8.2h.

What is the UV index reading in September in Split?

In September, the average daily maximum UV index in Split, Croatia, is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Split, Croatia
  • Average high temperature in September: 25.1°C

The warmest month (with the highest average high temperature) is July (29.8°C).
The month with the lowest average high temperature is January (10.3°C).

  • Average low temperature in September: 18.1°C

The month with the highest average low temperature is July (21.6°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).

Average rainfall in September - Split, Croatia
  • Average rainfall in September: 71.9mm

The wettest month (with the highest rainfall) is November (113.7mm).
The driest month (with the lowest rainfall) is July (28.4mm).

Average rainfall days in September - Split, Croatia
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is December (13 days).
The month with the lowest number of rainy days is August (5 days).

Average snowfall days in September - Split, Croatia
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January and February (1 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average sea temperature in September - Split, Croatia
  • Average sea temperature in September: 23.8°C

The best month for swimming (with the highest average sea temperature) is August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (13.5°C).

Average daylight in September / Average sunshine in September - Split, Croatia
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 8.2h

The month with most sunshine is July (Average sunshine: 11.3h).
The month with least sunshine is December (Average sunshine: 3.8h).

Average UV index in September - Split, Croatia
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).