December weather forecastRiola, Spain

December

Weather in December

The first month of the winter, December, is still a mild month in Riola, Spain, with an average temperature fluctuating between 15.5°C (59.9°F) and 8.2°C (46.8°F).

Temperature

Riola experiences a minor change to a moderate 15.5°C (59.9°F) in average high-temperature during December, closely reflecting November. In Riola, an average temperature of 8.2°C (46.8°F) is noted during December nights.

Humidity

October and December, with an average relative humidity of 66%, are the most humid months.

Rainfall

In Riola, during December, the rain falls for 6.1 days and regularly aggregates up to 34mm (1.34") of precipitation. Throughout the year, in Riola, there are 87.2 rainfall days, and 294mm (11.57") of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

The month with the shortest days in Riola, Spain, is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 08:02 and sunset at 17:38. On the last day of December, sunrise is at 08:20 and sunset at 17:48 CET.

Sunshine

November and December, with an average of 6.9h of sunshine, are months with the least sunshine in Riola.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the UV index of 4 transforms into the following advice:
Ensure safety - Sun damage prevention is strongly urged. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

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

Frequently asked questions

In Riola, 15.5°C (59.9°F) is the average high-temperature and 8.2°C (46.8°F) is the average low-temperature during December. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in September is appraised at 29°C (84.2°F).

The months with the highest humidity in Riola, Spain, are October and December, with an average relative humidity of 66%.

In Riola, Spain, the average relative humidity in December is 66%.

In December, in Riola, the rain falls for 6.1 days. Throughout December, 34mm (1.34") of precipitation is accumulated.

February through December are months without snowfall in Riola.

In Riola, Spain, in December, it doesn't snow. In January, it regularly snows.

With an average of 9h and 30min of daylight, December has the shortest days of the year in Riola.

The average day length in December in Riola, Spain, is 9h and 28min.

On the first day of December, sunrise is at 08:02 and sunset at 17:38. On the last day of the month, sunrise is at 08:20 and sunset at 17:48 CET.

November and December, with an average of 6.9h of sunshine, are months with the least sunshine in Riola, Spain.

In Riola, the average sunshine duration in December is 6.9h.

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.

In December, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

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

Nov

December

Jan

Average high temperature

18°C

15.5°C

14.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

14.7km/h

13.3km/h

15.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

20.2

22.9

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Riola, Spain

Average high temperature in December: 15.5°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (14.6°C).

Average low temperature in December: 8.2°C

The month with the highest average low temperature is August (22.2°C).
The coldest month (with the lowest average low temperature) is January (7.1°C).

Average pressure in December
Riola, Spain

Average pressure in December: 1021.8mbar

The month with the highest atmospheric pressure is December (1021.8mbar).
The month with the lowest atmospheric pressure is April (1014.8mbar).

Average wind speed in December
Riola, Spain

Average wind speed in December: 12.2km/h

The windiest month (with the highest average wind speed) is January (14.7km/h).
The calmest months (with the lowest average wind speed) are September and October (8.7km/h).

Average humidity in December
Riola, Spain

Average humidity in December: 66%

The months with the highest relative humidity are October and December (66%).
The month with the lowest relative humidity is June (57%).

Average rainfall in December
Riola, Spain

Average rainfall in December: 34mm

The wettest month (with the highest rainfall) is March (45mm).
The driest month (with the least rainfall) is July (7mm).

Average rainfall days in December
Riola, Spain

Average rainfall days in December: 6.1 days

The month with the highest number of rainy days is April (10.8 days).
The month with the least rainy days is August (4.5 days).

Average snowfall in December
Riola, Spain

Average snowfall in December: 0mm

The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in December
Riola, Spain

Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in December /
Average sunshine in December
Riola, Spain

Average daylight in December: 9h and 30min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

Average sunshine in December: 6h and 54min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 54min).

Average sunshine days in December
Riola, Spain

Average sunshine days in December: 23 days

The month with the most sunshine days is July (24.5 days).
The month with the least sunshine days is April (16.5 days).

Average UV index in December
Riola, Spain

Average UV index in December: 4

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

Average cloud cover in December
Riola, Spain

Average cloud cover in December: 23

The months with the most cloud cover are March and April (Cloud cover 27).
The month with the least cloud cover is July (Cloud cover 12).

Average visibility in December
Riola, Spain

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).