December weather forecast
Vieste, Italy

December

Weather in December

The first month of the winter, December, is also a fresh month in Vieste, Italy, with an average temperature varying between 9.4°C (48.9°F) and 12.7°C (54.9°F).

Temperature

A mild drop in Vieste's average high-temperature is observed in December, transitioning from a comfortable 16.6°C (61.9°F) in November to a cool 12.7°C (54.9°F). December nighttime temperatures in Vieste hover close to the daytime peak with an average of 9.4°C (48.9°F).

Humidity

In December, the average relative humidity is 72%.

Rainfall

In Vieste, during December, the rain falls for 13.6 days and regularly aggregates up to 42mm (1.65") of precipitation. In Vieste, during the entire year, the rain falls for 143.2 days and collects up to 526mm (20.71") of precipitation.

Snowfall

Months with snowfall in Vieste are January through April and December. December is the first month it typically snows in Vieste. Throughout December, in the average 0.6 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, in Vieste, there are 2.7 snowfall days, and 31mm (1.22") of snow is accumulated.

Sea temperature

In December, the average sea temperature in Vieste is 15.1°C (59.2°F).
Note: In water with a temperature of 15.1°C (59.2°F), most individuals do not find swimming enjoyable. As the temperature falls from 21°C (69.8°F) to 15°C (59°F), breathing control becomes more difficult.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year in Vieste, Italy.
On the first day of the month, sunrise is at 07:03 and sunset at 16:25. On the last day of December, sunrise is at 07:22 and sunset at 16:34 CET.

Sunshine

The average sunshine in December is 6.1h.

UV index

The months with the lowest UV index in Vieste are January and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 3 in December translates into this advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.

Frequently asked questions

What are December temperatures in Vieste?
An average high-temperature, in December, in Vieste, is 12.7°C (54.9°F) and the average low-temperature is 9.4°C (48.9°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is estimated at 31°C (87.8°F).
What is the average humidity in December in Vieste?
In Vieste, Italy, the average relative humidity in December is 72%.
How many days does it rain in December in Vieste?
In December, the rain falls for 13.6 days. Throughout December, 42mm (1.65") of precipitation is accumulated.
When does it start snowing in Vieste?
December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 6mm (0.24") of snow.
How cold is the water in December in Vieste?
In Vieste, the average seawater temperature in December is 15.1°C (59.2°F). For swimming, a surface water temperature of 15.1°C (59.2°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
What is the month with the shortest days in Vieste?
December has the shortest days of the year in Vieste, with an average of 9h and 12min of daylight.
How many hours of daylight does Vieste have in December?
In Vieste, the average day length in December is 9h and 11min.
When is the sunrise / sunset in December in Vieste?
In December, on the first day of the month, sunrise is at 07:03 and sunset at 16:25. On the last day of the month, in Vieste, Italy, sunrise is at 07:22 and sunset at 16:34 CET.
How many hours of sunshine does Vieste have in December?
In December, the average sunshine duration in Vieste is 6.1h.
What is the month with the lowest UV index in Vieste?
The months with the lowest UV index in Vieste are January and December, with an average maximum UV index of 3.
What is the UV index reading in December in Vieste?
In December, the average daily maximum UV index in Vieste, Italy, is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
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 December
Vieste, Italy
  • Average high temperature in December: 12.7°C

The warmest month (with the highest average high temperature) is August (28.6°C).
The month with the lowest average high temperature is January (11.4°C).

  • Average low temperature in December: 9.4°C

The month with the highest average low temperature is August (23.8°C).
The coldest months (with the lowest average low temperature) are January and February (7.8°C).

Average pressure in December
Vieste, Italy
  • Average pressure in December: 1017.9mbar

The month with the highest atmospheric pressure is December (1017.9mbar).
The month with the lowest atmospheric pressure is July (1013.1mbar).

Average wind speed in December
Vieste, Italy
  • Average wind speed in December: 16.3km/h

The windiest month (with the highest average wind speed) is February (17.7km/h).
The calmest month (with the lowest average wind speed) is August (11.4km/h).

Average humidity in December
Vieste, Italy
  • Average humidity in December: 72%

The month with the highest relative humidity is November (75%).
The month with the lowest relative humidity is July (60%).

Average rainfall in December
Vieste, Italy
  • Average rainfall in December: 42mm

The wettest month (with the highest rainfall) is November (71mm).
The driest month (with the least rainfall) is August (13mm).

Average rainfall days in December
Vieste, Italy
  • Average rainfall days in December: 13.6 days

The month with the highest number of rainy days is January (15.7 days).
The month with the least rainy days is August (5.8 days).

Average snowfall in December
Vieste, Italy
  • Average snowfall in December: 6mm

The month with the highest snowfall is January (9mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).

Average snowfall days in December
Vieste, Italy
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).

Average sea temperature in December
Vieste, Italy
  • Average sea temperature in December: 15.1°C

The best months for swimming (with the highest average sea temperature) are July and August (25.3°C).
The coldest month (with the lowest average sea temperature) is January (13.6°C).

Average daylight in December /
Average sunshine in December
Vieste, Italy
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 6h and 1min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).

Average sunshine days in December
Vieste, Italy
  • Average sunshine days in December: 14.2 days

The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is January (12.2 days).

Average UV index in December
Vieste, Italy
  • Average UV index in December: 3

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

Average cloud cover in December
Vieste, Italy
  • Average cloud cover in December: 32

The month with the most cloud cover is January (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 9).

Average visibility in December
Vieste, 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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