Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
With the onset of December, the average high-temperature subtly recedes from November's comfortable 16.9°C (62.4°F) to a mild 13°C (55.4°F). December nights register a minor temperature decline, steadying at a chilly 8°C (46.4°F).Humidity
In Siano, Italy, the average relative humidity in December is 73%.Rainfall
In Siano, in December, during 13.3 rainfall days, 63mm (2.48") of precipitation is typically accumulated. Throughout the year, there are 149.6 rainfall days, and 614mm (24.17") of precipitation is accumulated.Snowfall
In Siano, snow does not fall in March through December.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 07:06 and sunset at 16:34. On the last day of December, sunrise is at 07:25 and sunset at 16:43 CET.
Sunshine
In Siano, 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. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 3 in December transforms into the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the average humidity in December?
How much does it rain in December?
When it does not snow?
Does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Siano, Italy
- Average high temperature in December: 13°C
The warmest month (with the highest average high temperature) is August (30.2°C).
The month with the lowest average high temperature is January (11.7°C).
- Average low temperature in December: 8°C
The month with the highest average low temperature is August (21.6°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).
Average pressure in December
Siano, 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 July (1013.9mbar).
Average wind speed in December
Siano, Italy
- Average wind speed in December: 11.9km/h
The windiest month (with the highest average wind speed) is February (13.1km/h).
The calmest month (with the lowest average wind speed) is August (7.7km/h).
Average humidity in December
Siano, 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 (61%).
Average rainfall in December
Siano, Italy
- Average rainfall in December: 63mm
The wettest month (with the highest rainfall) is November (122mm).
The driest month (with the least rainfall) is August (11mm).
Average rainfall days in December
Siano, Italy
- Average rainfall days in December: 13.3 days
The month with the highest number of rainy days is January (15.6 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in December
Siano, Italy
- Average snowfall in December: 0mm
The months with the highest snowfall are January and February (3mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Siano, Italy
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Siano, 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 July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in December
Siano, Italy
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is July (22.4 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in December
Siano, 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, February and December (UV index 3).
Average cloud cover in December
Siano, Italy
- Average cloud cover in December: 33
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Siano, 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).
