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 sea temperature 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
In December, Castro Urdiales experiences a minor shift in meteorological conditions with average high-temperatures marked at a cool 12.1°C (53.8°F), closely mirroring the climate in November. The nighttime temperature in December experiences a minor dip, averaging a frosty 8.4°C (47.1°F).Humidity
In December, the average relative humidity in Castro Urdiales is 74%.Rainfall
In December, in Castro Urdiales, the rain falls for 16.5 days. Throughout December, 58mm (2.28") of precipitation is accumulated. In Castro Urdiales, during the entire year, the rain falls for 207.3 days and collects up to 710mm (27.95") of precipitation.Snowfall
January through March and December are months with snowfall in Castro Urdiales, Spain. December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 3mm (0.12") of snow. Throughout the year, in Castro Urdiales, there are 3.1 snowfall days, and 34mm (1.34") of snow is accumulated.Sea temperature
In Castro Urdiales, the average seawater temperature in December is 14.3°C (57.7°F).Note: Swimming in 14.3°C (57.7°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience.
Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Castro Urdiales.On the first day of the month, sunrise is at 08:25 and sunset at 17:38. On the last day of December, sunrise is at 08:45 and sunset at 17:46 CET.
Sunshine
In Castro Urdiales, the average sunshine in December is 5.4h.UV index
January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Castro Urdiales. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during December leads to these instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What are December temperatures in Castro Urdiales?
What is the average humidity in December in Castro Urdiales?
How much does it rain in Castro Urdiales in December?
When does it start to snow in Castro Urdiales?
What is the water temperature in December in Castro Urdiales?
What is the month with the shortest days in Castro Urdiales?
How many hours of daylight does Castro Urdiales have in December?
When are sunrise and sunset in December in Castro Urdiales?
How many hours of sunshine does Castro Urdiales have in December?
When is the lowest UV index in Castro Urdiales?
How high is the UV index in December in Castro Urdiales?
Average temperature in December
Castro Urdiales, Spain
- Average high temperature in December: 12.1°C
The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in December: 8.4°C
The month with the highest average low temperature is August (17.3°C).
The coldest month (with the lowest average low temperature) is February (7.1°C).
Average pressure in December
Castro Urdiales, Spain
- Average pressure in December: 1021.7mbar
The month with the highest atmospheric pressure is December (1021.7mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in December
Castro Urdiales, Spain
- Average wind speed in December: 16.7km/h
The windiest month (with the highest average wind speed) is February (17.8km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).
Average humidity in December
Castro Urdiales, Spain
- Average humidity in December: 74%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Castro Urdiales, Spain
- Average rainfall in December: 58mm
The wettest month (with the highest rainfall) is November (115mm).
The driest months (with the least rainfall) are July and August (36mm).
Average rainfall days in December
Castro Urdiales, Spain
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is November (19.7 days).
The month with the least rainy days is October (14.5 days).
Average snowfall in December
Castro Urdiales, Spain
- Average snowfall in December: 3mm
The month with the highest snowfall is February (23mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Castro Urdiales, Spain
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Castro Urdiales, Spain
- Average sea temperature in December: 14.3°C
The best month for swimming (with the highest average sea temperature) is August (21.2°C).
The coldest month (with the lowest average sea temperature) is February (12.7°C).
Average daylight in December /
Average sunshine in December
Castro Urdiales, Spain
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 2min
The months with the most sunshine are June and July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 12min).
Average sunshine days in December
Castro Urdiales, Spain
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is October (13.3 days).
The month with the least sunshine days is November (8.1 days).
Average UV index in December
Castro Urdiales, Spain
- Average UV index in December: 3
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in December
Castro Urdiales, Spain
- Average cloud cover in December: 44
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are September and October (Cloud cover 34).
Average visibility in December
Castro Urdiales, Spain
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, June, July, August, September, October and December (10km).
The months with the lowest visibility are January, May and November (9km).
Castro Urdiales, Spain
Weather forecast for your location
2. Allow the app to use your location
