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
Weather in December
Temperature
December's onset brings a negligible change in high-temperatures, falling from a cool 11.9°C (53.4°F) in November to a chilly 8.9°C (48°F). In December, Castrillo de Onielo records an average nighttime temperature of 2.4°C (36.3°F).Humidity
In Castrillo de Onielo, the average relative humidity in December is 79%.Rainfall
In December, in Castrillo de Onielo, Spain, the rain falls for 8.8 days. Throughout December, 33mm (1.3") of precipitation is accumulated. Throughout the year, in Castrillo de Onielo, there are 113.7 rainfall days, and 336mm (13.23") of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Castrillo de Onielo, Spain, in December, during 0.9 snowfall days, 17mm (0.67") of snow is typically accumulated. In Castrillo de Onielo, Spain, during the entire year, snow falls for 8.6 days and aggregates up to 84mm (3.31") of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 08:25 and sunset at 17:47. On the last day of the month, sunrise is at 08:44 and sunset at 17:56 CET.
Sunshine
December has the least sunshine of the year, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index in Castrillo de Onielo are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
What is the usual temperature for Castrillo de Onielo in December?
What is the average humidity in December in Castrillo de Onielo?
How much does it rain in Castrillo de Onielo in December?
How much does it snow in Castrillo de Onielo in December?
What is the month with the shortest days in Castrillo de Onielo?
What is the average length of the day in December in Castrillo de Onielo?
What time are sunrise and sunset in December in Castrillo de Onielo?
What is the month with the least sunshine in Castrillo de Onielo?
How many hours of sunshine does Castrillo de Onielo have in December?
When is the lowest UV index in Castrillo de Onielo?
How high is the UV index in December in Castrillo de Onielo?
Average temperature in December
Castrillo de Onielo, Spain
- Average high temperature in December: 8.9°C
The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (8.1°C).
- Average low temperature in December: 2.4°C
The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average pressure in December
Castrillo de Onielo, Spain
- Average pressure in December: 1023.1mbar
The month with the highest atmospheric pressure is December (1023.1mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in December
Castrillo de Onielo, Spain
- Average wind speed in December: 12.5km/h
The windiest month (with the highest average wind speed) is March (15.9km/h).
The calmest month (with the lowest average wind speed) is September (11.7km/h).
Average humidity in December
Castrillo de Onielo, Spain
- Average humidity in December: 79%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in December
Castrillo de Onielo, Spain
- Average rainfall in December: 33mm
The wettest month (with the highest rainfall) is April (47mm).
The driest month (with the least rainfall) is August (9mm).
Average rainfall days in December
Castrillo de Onielo, Spain
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is April (14.3 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in December
Castrillo de Onielo, Spain
- Average snowfall in December: 17mm
The month with the highest snowfall is January (25mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Castrillo de Onielo, Spain
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Castrillo de Onielo, Spain
- 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: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Castrillo de Onielo, Spain
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is April (13.6 days).
Average UV index in December
Castrillo de Onielo, Spain
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Castrillo de Onielo, Spain
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Castrillo de Onielo, Spain
- Average visibility in December: 9km
The months with the highest visibility are February, June, July, August, September and October (10km).
The months with the lowest visibility are January, March, April, May, November and December (9km).
Castrillo de Onielo, Spain
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