December weather forecastFormia, Italy

December

Weather in December

December, the first month of the winter in Formia, is still a cool month, with an average temperature ranging between min 8.4°C (47.1°F) and max 12.9°C (55.2°F).

Temperature

December implies a soft temperature shift, with average high-temperatures reducing from November's comfortable 16.5°C (61.7°F) to a fresh 12.9°C (55.2°F). Formia's December nights demonstrate minimal variation from the daytime temperatures, with an average of 8.4°C (47.1°F).

Humidity

The average relative humidity in December in Formia is 73%.

Rainfall

In Formia, in December, it is raining for 13.1 days, with typically 55mm (2.17") of accumulated precipitation. In Formia, during the entire year, the rain falls for 135.6 days and collects up to 569mm (22.4") of precipitation.

Snowfall

March through December are months without snowfall in Formia.

Sea temperature

In Formia, the average seawater temperature in December is 16.3°C (61.3°F).
Note: The majority of individuals find it unpleasurable to swim in 16.3°C (61.3°F). It becomes progressively harder to manage one's breathing as the water temperature falls below 21°C (69.8°F).

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December in Formia, sunrise is at 07:12 and sunset at 16:37. On the last day of the month, sunrise is at 07:31 and sunset at 16:46 CET.

Sunshine

In Formia, the average sunshine in December 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 Formia, Italy. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Ensure safety - Sun damage prevention is strongly urged. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.

Updated: Jan 30, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in December, in Formia, is 12.9°C (55.2°F), while the low-temperature averages to 8.4°C (47.1°F). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is estimated at 31°C (87.8°F).

In December, the average relative humidity is 73%.

In Formia, Italy, in December, it is raining for 13.1 days, with typically 55mm (2.17") of accumulated precipitation.

In Formia, Italy, snow does not fall in March through December.

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

In Formia, the average seawater temperature in December is 16.3°C (61.3°F). Swimming in 16.3°C (61.3°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

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

In December, the average day length in Formia, Italy, is 9h and 16min.

In December, on the first day of the month, sunrise is at 07:12 and sunset at 16:37. On the last day of the month, in Formia, Italy, sunrise is at 07:31 and sunset at 16:46 CET.

In December, the average sunshine duration in Formia is 6.2h.

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

In December, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

16.5°C

12.9°C

11.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.9km/h

13.4km/h

13.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

13.1

Average snowfall days

0.1

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.5

15.5

13.7

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Formia, Italy

Average high temperature in December: 12.9°C

The warmest month (with the highest average high temperature) is August (28.7°C).
The month with the lowest average high temperature is January (11.6°C).

Average low temperature in December: 8.4°C

The month with the highest average low temperature is August (21.6°C).
The coldest month (with the lowest average low temperature) is February (7°C).

Average pressure in December
Formia, Italy

Average pressure in December: 1018.5mbar

The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is April (1014.1mbar).

Average wind speed in December
Formia, Italy

Average wind speed in December: 12.2km/h

The windiest month (with the highest average wind speed) is February (13km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).

Average humidity in December
Formia, Italy

Average humidity in December: 73%

The months with the highest relative humidity are January and November (75%).
The month with the lowest relative humidity is August (63%).

Average rainfall in December
Formia, Italy

Average rainfall in December: 55mm

The wettest month (with the highest rainfall) is November (120mm).
The driest month (with the least rainfall) is August (10mm).

Average rainfall days in December
Formia, Italy

Average rainfall days in December: 13.1 days

The months with the highest number of rainy days are January and November (15 days).
The month with the least rainy days is August (4.2 days).

Average snowfall days in December
Formia, Italy

Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.3 days).
The 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
Formia, Italy

Average sea temperature in December: 16.3°C

The best month for swimming (with the highest average sea temperature) is August (25.8°C).
The coldest month (with the lowest average sea temperature) is February (13.8°C).

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

Average daylight in December: 9h and 18min

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 12min

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

Average sunshine days in December
Formia, Italy

Average sunshine days in December: 15.5 days

The month with the most sunshine days is August (24.2 days).
The month with the least sunshine days is February (12.3 days).

Average UV index in December
Formia, 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 and December (UV index 3).

Average cloud cover in December
Formia, Italy

Average cloud cover in December: 31

The month with the most cloud cover is January (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 9).

Average visibility in December
Formia, 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).