December weather forecast and climate
Naples, Italy

A distant view of Mount Vesuvius, from Naples in Italy, with a beautiful blue waterfront
A distant view of Mount Vesuvius, from Naples in Italy, with a beautiful blue waterfront
December, the first month of the winter, in Naples, is still a mild month, with average temperature fluctuating between 9.1°C (48.4°F) and 13.6°C (56.5°F).

Temperature

In Naples, the average high-temperature in December marginally drops, from an enjoyable 17.5°C (63.5°F) in November, to a mild 13.6°C (56.5°F). In December, the average low-temperature is 9.1°C (48.4°F).

Humidity

In Naples, the average relative humidity is 71%.

Rainfall

In December, the rain falls for 13.4 days. Throughout December, 55mm (2.17") of precipitation is accumulated. In Naples, during the entire year, the rain falls for 139.4 days and collects up to 569mm (22.4") of precipitation.

Snowfall

March through December are months without snowfall.

Sea temperature

In December, the average sea temperature is 16.4°C (61.5°F).
Note: Swimming in 16.4°C (61.5°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

The month with the shortest days is December, with an average of 9.3h of daylight.

Sunshine

In December, the average sunshine is 6.2h.

UV index

January, February and December, with an average maximum UV index of 3, are months with the lowest UV index in Naples. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Naples?

The average high-temperature, in December, in Naples, Italy, is 13.6°C (56.5°F), while the average low-temperature is 9.1°C (48.4°F).

What is the average humidity in December in Naples?

In Naples, the average relative humidity in December is 71%.

How many days does it rain in December in Naples?

In Naples, Italy, during December, the rain falls for 13.4 days and regularly aggregates up to 55mm (2.17") of precipitation.

Does it snow in Naples in December?

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

When it does not snow in Naples?

In Naples snow does not fall in March through December.

What is the sea temperature in December in Naples?

In Naples, Italy, the average seawater temperature in December is 16.4°C (61.5°F). For swimming, a surface water temperature of 16.4°C (61.5°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 Naples?

The month with the shortest days in Naples is December, with an average of 9.3h of daylight.

How many hours of daylight does Naples have in December?

The average length of the day in December in Naples, Italy, is 9.3h.

How long on average sun shines in December in Naples?

The average sunshine in December in Naples, Italy, is 6.2h.

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

Months with the lowest UV index in Naples, Italy, are January, February and December, with an average maximum UV index of 3.

How high is the UV index in December in Naples?

In December, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Naples, Italy
  • Average high temperature in December: 13.6°C

The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (12.3°C).

  • Average low temperature in December: 9.1°C

The month with the highest average low temperature is August (22.7°C).
The coldest months (with the lowest average low temperature) are January and February (7.8°C).

Average pressure in December - Naples, Italy
  • Average pressure in December: 1018.4mbar

The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is April (1014mbar).

Average wind speed in December - Naples, Italy
  • Average wind speed in December: 12.9km/h

The windiest month (with the highest average wind speed) is February (13.9km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).

Average humidity in December - Naples, Italy
  • Average humidity in December: 71%

Months with the highest relative humidity are January and November (73%).
The month with the lowest relative humidity is August (61%).

Average rainfall in December - Naples, Italy
  • Average rainfall in December: 55mm

The wettest month (with the highest rainfall) is November (114mm).
The driest month (with the least rainfall) is August (8mm).

Average rainfall days in December - Naples, Italy
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is January (15.4 days).
Months with the least rainy days are July and August (5.2 days).

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

Months with the highest snowfall are January and February (2mm).
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

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

Months with the highest number of snowfall days are January and February (0.4 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average sea temperature in December - Naples, Italy
  • Average sea temperature in December: 16.4°C

The best month for swimming (with the highest average sea temperature) is August (26°C).
The coldest month (with the lowest average sea temperature) is February (13.9°C).

Average daylight in December / Average sunshine in December - Naples, Italy
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 6.2h

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

Average sunshine days in December - Naples, Italy
  • Average sunshine days in December: 14.9 days

The month with the most sunshine days is July (24 days).
The month with the least sunshine days is February (11.1 days).

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

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

Average cloud cover in December - Naples, Italy
  • Average cloud cover in December: 33

The month with the most cloud cover is January (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 9).

Average visibility in December - Naples, Italy
  • Average visibility in December: 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).