September weather forecast
Dubrovnik, Croatia

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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

September experiences a gradual cooling in Dubrovnik as the weather shifts towards autumn. Despite this, the month presents conditions resembling that of a mild summer, where sunlight hours remain relatively high. Rainfall starts to increase, with September seeing an apparent rise from the preceding month, amounting to 54mm. Beach visits continue to be a popular activity as sea temperatures sustain an inviting warmth for visitors.

Temperature

The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from 27.9°C in August to a still moderately hot 23.4°C. Dubrovnik registers a consistent average low-temperature of 18.2°C during September.

Humidity

The average relative humidity in September is 64%.

Rainfall

In Dubrovnik, in September, during 9.9 rainfall days, 54mm of precipitation is typically accumulated. Throughout the year, there are 134.6 rainfall days, and 827mm of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Sea temperature

In September, the average sea temperature in Dubrovnik is 24.3°C.
Note: Your comfort in 24.3°C waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 25°C to 28°C.

Daylight

In Dubrovnik, the average length of the day in September is 12h and 29min.
On the first day of September in Dubrovnik, sunrise is at 06:12 and sunset at 19:23. On the last day of the month, sunrise is at 06:43 and sunset at 18:32 CEST.

Sunshine

In September, the average sunshine is 10.4h.

UV index

In September, the average daily maximum UV index in Dubrovnik, Croatia, is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index, 5 during September, leads to the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Alert! UV radiation becomes sharper due to reflections from sand and water.
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FAQ

What is the usual temperature for Dubrovnik in September?

Dubrovnik in September has an average high-temperature of 23.4°C and an average low-temperature of 18.2°C. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 30°C.

What is the average humidity in September in Dubrovnik?

The average relative humidity in September 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 of accumulated precipitation.

When it does not snow in Dubrovnik?

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

What is the water temperature in September in Dubrovnik?

In September, the average sea temperature in Dubrovnik, Croatia, is 24.3°C. A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.3°C water.

What is the average length of the day in September in Dubrovnik?

In Dubrovnik, Croatia, the average day length in September is 12h and 29min.

When is the sunrise / sunset in September in Dubrovnik?

On the first day of September in Dubrovnik, Croatia, sunrise is at 06:12 and sunset at 19:23. On the last day of the month, sunrise is at 06:43 and sunset at 18:32 CEST.

How long on average sun shines in September in Dubrovnik?

The average sunshine duration in September in Dubrovnik is 10.4h.

How high is the UV index in September in Dubrovnik?

In Dubrovnik, Croatia, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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).
The 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).
The 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: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

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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).
The 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

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

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Dubrovnik, Croatia

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