September weather forecast and climate
Dubrovnik, Croatia

The fortresses of Dubrovnik in Croatia, set on rocks surrounded by calm, clear waters
The fortresses of Dubrovnik in Croatia, set on rocks surrounded by calm, clear waters

Weather in September

The first month of the autumn, September, is still a warm month in Dubrovnik, Croatia, with average temperature varying between 23.4°C (74.1°F) and 18.2°C (64.8°F).

Temperature

In Dubrovnik, Croatia, the average high-temperature marginally drops, from 27.9°C (82.2°F) in August, to a still warm 23.4°C (74.1°F). The average low-temperature, in September, is 18.2°C (64.8°F).

Humidity

In September, the average relative humidity in Dubrovnik, Croatia, is 64%.

Rainfall

In Dubrovnik, it is raining for 9.9 days, with typically 54mm (2.13") of accumulated precipitation. In Dubrovnik, during the entire year, the rain falls for 134.6 days and collects up to 827mm (32.56") of precipitation.

Snowfall

January, March through December are months without snowfall.

Sea temperature

In September, the average sea temperature is 24.3°C (75.7°F).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.3°C (75.7°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 Dubrovnik is 12.5h.

Sunshine

In Dubrovnik, the average sunshine is 10.4h.

UV index

The average daily maximum UV index in Dubrovnik, Croatia, 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the average humidity in September in Dubrovnik?

In September, the average relative humidity in Dubrovnik is 64%.

How many days does it rain in September in Dubrovnik?

In Dubrovnik, in September, it is raining for 9.9 days, with typically 54mm (2.13") of accumulated precipitation.

When it does not snow in Dubrovnik?

January, March through December are months without snowfall in Dubrovnik.

What is the sea temperature in September in Dubrovnik?

In Dubrovnik, Croatia, in September, the average water temperature is 24.3°C (75.7°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.3°C (75.7°F) water may be enjoyable.

How many hours of daylight does Dubrovnik have in September?

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

How long on average sun shines in September in Dubrovnik?

The average sunshine in September in Dubrovnik, Croatia, is 10.4h.

What is the UV index intensity in September in Dubrovnik?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Dubrovnik, Croatia

Average temperature in September - Dubrovnik, Croatia
  • Average high temperature in September: 23.4°C

The warmest month (with the highest average high temperature) is August (27.9°C).
The month with the lowest average high temperature is January (9.4°C).

  • Average low temperature in September: 18.2°C

The month with the highest average low temperature is August (21.8°C).
The coldest month (with the lowest average low temperature) is January (5.8°C).

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Average pressure in September
Dubrovnik, Croatia

Average pressure in September - Dubrovnik, Croatia
  • Average pressure in September: 1016.1mbar

The month with the highest atmospheric pressure is December (1019.2mbar).
The month with the lowest atmospheric pressure is July (1013.9mbar).

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Average wind speed in September
Dubrovnik, Croatia

Average wind speed in September - Dubrovnik, Croatia
  • Average wind speed in September: 12km/h

The windiest month (with the highest average wind speed) is February (16.8km/h).
The calmest month (with the lowest average wind speed) is August (10.5km/h).

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Average humidity in September
Dubrovnik, Croatia

Average humidity in September - Dubrovnik, Croatia
  • Average humidity in September: 64%

The month with the highest relative humidity is February (73%).
The month with the lowest relative humidity is August (62%).

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Average rainfall in September
Dubrovnik, Croatia

Average rainfall in September - Dubrovnik, Croatia
  • Average rainfall in September: 54mm

The wettest month (with the highest rainfall) is November (165mm).
The driest month (with the least rainfall) is July (22mm).

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Average rainfall days in September
Dubrovnik, Croatia

Average rainfall days in September - Dubrovnik, Croatia
  • Average rainfall days in September: 9.9 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is August (5.4 days).

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Average snowfall in September
Dubrovnik, Croatia

Average snowfall in September - Dubrovnik, Croatia
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (3mm).
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in September
Dubrovnik, Croatia

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

The month with the highest number of snowfall days is February (0.3 days).
Months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).

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Average sea temperature in September
Dubrovnik, Croatia

Average sea temperature in September - Dubrovnik, Croatia
  • Average sea temperature in September: 24.3°C

The best month for swimming (with the highest average sea temperature) is July (25.5°C).
The coldest months (with the lowest average sea temperature) are January and February (14.2°C).

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Average daylight in September /
Average sunshine in September
Dubrovnik, Croatia

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

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 10.4h

The month with the most sunshine is August (Average sunshine: 12.1h).
The month with the least sunshine is February (Average sunshine: 5.6h).

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Average sunshine days in September
Dubrovnik, Croatia

Average sunshine days in September - Dubrovnik, Croatia
  • Average sunshine days in September: 18.1 days

The month with the most sunshine days is August (21.4 days).
The month with the least sunshine days is May (13.8 days).

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Average UV index in September
Dubrovnik, Croatia

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

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Dubrovnik, Croatia

Average cloud cover in September - Dubrovnik, Croatia
  • Average cloud cover in September: 18

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 10).

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Average visibility in September
Dubrovnik, Croatia

Average visibility in September - Dubrovnik, Croatia
  • Average visibility in September: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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