December weather forecast
Castelsardo, Italy

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Weather in December

The first month of the winter, December, is also a moderate month in Castelsardo, Italy, with an average temperature varying between 9.4°C (48.9°F) and 13.5°C (56.3°F).

Temperature

Castelsardo's progression into December involves a gentle drop in the average high-temperature, from an enjoyable 16.5°C (61.7°F) in November to a moderate 13.5°C (56.3°F). In Castelsardo, the average low-temperature during December nights tends to settle at a chilly 9.4°C (48.9°F), indicating a slight drop from the daytime peak.

Humidity

In December, the average relative humidity in Castelsardo is 77%.

Rainfall

In Castelsardo, Italy, during December, the rain falls for 11.9 days and regularly aggregates up to 33mm (1.3") of precipitation. In Castelsardo, during the entire year, the rain falls for 117.6 days and collects up to 327mm (12.87") of precipitation.

Snowfall

March through December are months without snowfall in Castelsardo.

Sea temperature

In Castelsardo, the average seawater temperature in December is 16.2°C (61.2°F).
Note: For most, swimming in 16.2°C (61.2°F) is not a pleasant activity. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

The month with the shortest days in Castelsardo is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 07:30 and sunset at 16:57. On the last day of December, in Castelsardo, sunrise is at 07:49 and sunset at 17:07 CET.

Sunshine

In Castelsardo, Italy, the average sunshine in December is 6.1h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

What is the temperature in December in Castelsardo?

The high-temperature, in December, in Castelsardo, is 13.5°C (56.3°F), while the low-temperature averages to 9.4°C (48.9°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 31°C (87.8°F).

What is the average humidity in December in Castelsardo?

The average relative humidity in December is 77%.

How much does it rain in Castelsardo in December?

In Castelsardo, Italy, during December, the rain falls for 11.9 days and regularly aggregates up to 33mm (1.3") of precipitation.

When it does not snow in Castelsardo?

March through December are months without snowfall in Castelsardo, Italy.

Does it snow in Castelsardo in December?

In Castelsardo, Italy, in December, it doesn't snow. In January, it regularly snows.

What is the sea temperature in December in Castelsardo?

In Castelsardo, in December, the average water temperature is 16.2°C (61.2°F). Swimming in 16.2°C (61.2°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the month with the shortest days in Castelsardo?

December has the shortest days of the year in Castelsardo, with an average of 9h and 18min of daylight.

How many hours of daylight does Castelsardo have in December?

In December, the average day length in Castelsardo is 9h and 18min.

When are sunrise and sunset in December in Castelsardo?

On the first day of December in Castelsardo, Italy, sunrise is at 07:30 and sunset at 16:57. On the last day of the month, sunrise is at 07:49 and sunset at 17:07 CET.

How many hours of sunshine does Castelsardo have in December?

In Castelsardo, the average sunshine duration in December is 6.1h.

What is the month with the lowest UV index in Castelsardo?

The months with the lowest UV index in Castelsardo are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in December in Castelsardo?

In Castelsardo, Italy, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in December
Castelsardo, Italy

Average temperature in December - Castelsardo, Italy
  • Average high temperature in December: 13.5°C

The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is February (11.9°C).

  • Average low temperature in December: 9.4°C

The month with the highest average low temperature is August (21.2°C).
The coldest month (with the lowest average low temperature) is February (7.1°C).

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Average pressure in December
Castelsardo, Italy

Average pressure in December - Castelsardo, Italy
  • Average pressure in December: 1018.7mbar

The month with the highest atmospheric pressure is December (1018.7mbar).
The month with the lowest atmospheric pressure is November (1013.9mbar).

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Average wind speed in December
Castelsardo, Italy

Average wind speed in December - Castelsardo, Italy
  • Average wind speed in December: 17.4km/h

The windiest month (with the highest average wind speed) is January (17.9km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).

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Average humidity in December
Castelsardo, Italy

Average humidity in December - Castelsardo, Italy
  • Average humidity in December: 77%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in December
Castelsardo, Italy

Average rainfall in December - Castelsardo, Italy
  • Average rainfall in December: 33mm

The wettest month (with the highest rainfall) is November (62mm).
The driest month (with the least rainfall) is July (6mm).

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Average rainfall days in December
Castelsardo, Italy

Average rainfall days in December - Castelsardo, Italy
  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is November (14.2 days).
The month with the least rainy days is July (4.1 days).

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Average snowfall in December
Castelsardo, Italy

Average snowfall in December - Castelsardo, Italy
  • Average snowfall in December: 0mm

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

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Average snowfall days in December
Castelsardo, Italy

Average snowfall days in December - Castelsardo, Italy
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.7 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 December
Castelsardo, Italy

Average sea temperature in December - Castelsardo, Italy
  • Average sea temperature in December: 16.2°C

The best month for swimming (with the highest average sea temperature) is August (24.1°C).
The coldest month (with the lowest average sea temperature) is February (13.3°C).

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Average daylight in December /
Average sunshine in December
Castelsardo, Italy

Average daylight in December / Average sunshine in December - Castelsardo, Italy
  • Average daylight in December: 9h and 2min

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

  • Average sunshine in December: 6h and 1min

The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).

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Average sunshine days in December
Castelsardo, Italy

Average sunshine days in December - Castelsardo, Italy
  • Average sunshine days in December: 15.9 days

The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is November (13.5 days).

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Average UV index in December
Castelsardo, Italy

Average UV index in December - Castelsardo, Italy
  • Average UV index in December: 3

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 December
Castelsardo, Italy

Average cloud cover in December - Castelsardo, Italy
  • Average cloud cover in December: 35

The month with the most cloud cover is January (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in December
Castelsardo, Italy

Average visibility in December - Castelsardo, Italy
  • Average visibility in December: 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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Castelsardo, Italy

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