December weather forecastCastro Urdiales, Spain

December

Weather in December

December, the first month of the winter in Castro Urdiales, is still a cool month, with temperature in the range of an average high of 12.1°C (53.8°F) and an average low of 8.4°C (47.1°F).

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.

Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in Castro Urdiales, is 12.1°C (53.8°F) and the average low-temperature is 8.4°C (47.1°F).

In December, the average relative humidity in Castro Urdiales, Spain, is 74%.

In Castro Urdiales, in December, during 16.5 rainfall days, 58mm (2.28") of precipitation is typically accumulated.

December is the first month it typically snows in Castro Urdiales, Spain. Throughout December, in the average 0.6 snowfall days, it receives 3mm (0.12") of snow.

In Castro Urdiales, Spain, in December, the average water temperature is 14.3°C (57.7°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

December has the shortest days of the year, with an average of 9h and 0min of daylight.

In Castro Urdiales, Spain, the average day length in December is 9h and 2min.

On the first day of December in Castro Urdiales, Spain, sunrise is at 08:25 and sunset at 17:38. On the last day of the month, sunrise is at 08:45 and sunset at 17:46 CET.

In December, the average sunshine duration in Castro Urdiales is 5.4h.

January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

In Castro Urdiales, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from 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

14.5°C

12.1°C

10.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

18.9km/h

17.6km/h

17.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.6

0.8

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

8.1

12.5

9.1

Average UV index

Average cloud cover

Average visibility

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 24min

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).