December weather forecastViana, Spain
December
Weather in December
The first month of the winter, December, is still a chilly month in Viana, Spain, with an average temperature fluctuating between 2.6°C (36.7°F) and 9.9°C (49.8°F).Temperature
The arrival of December brings an average high-temperature of a chilly 9.9°C (49.8°F), nearly identical to November's 12.5°C (54.5°F). Throughout December, an average nighttime temperature of 2.6°C (36.7°F) is experienced.Humidity
The average relative humidity in December in Viana is 77%.Rainfall
In Viana, in December, it is raining for 9 days, with typically 15mm (0.59") of accumulated precipitation. Throughout the year, in Viana, there are 133.7 rainfall days, and 275mm (10.83") of precipitation is accumulated.Snowfall
January through March and December are months with snowfall in Viana. December is the first month it typically snows. Throughout December, in the average 1.3 snowfall days, it receives 13mm (0.51") of snow. In Viana, during the entire year, snow falls for 6.9 days and aggregates up to 52mm (2.05") of snow.Daylight
The month with the shortest days in Viana is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 08:19 and sunset at 17:37. On the last day of December, sunrise is at 08:39 and sunset at 17:46 CET.
Sunshine
In Viana, the average sunshine in December is 6.4h.UV index
In Viana, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: An average UV index of 3 in December transforms into this advice:
Take necessary precautions - Suggestions to elude sunburn are provided. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Viana, Spain
- Average high temperature in December: 9.9°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in December: 2.6°C
The month with the highest average low temperature is August (14.7°C).
The coldest month (with the lowest average low temperature) is February (1.8°C).
Average pressure in December
Viana, Spain
- Average pressure in December: 1022.5mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in December
Viana, Spain
- Average wind speed in December: 10.8km/h
The windiest month (with the highest average wind speed) is February (13.3km/h).
The calmest month (with the lowest average wind speed) is September (9km/h).
Average humidity in December
Viana, Spain
- Average humidity in December: 77%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (62%).
Average rainfall in December
Viana, Spain
- Average rainfall in December: 15mm
The wettest month (with the highest rainfall) is November (37mm).
The driest month (with the least rainfall) is September (10mm).
Average rainfall days in December
Viana, Spain
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is April (14.4 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in December
Viana, Spain
- Average snowfall in December: 13mm
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
Viana, Spain
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Viana, Spain
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 6h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is November (Average sunshine: 6h and 0min).
Average sunshine days in December
Viana, Spain
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is August (20.1 days).
The months with the least sunshine days are April and May (11.8 days).
Average UV index in December
Viana, Spain
- Average UV index in December: 3
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in December
Viana, Spain
- Average cloud cover in December: 33
The months with the most cloud cover are January and November (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
Viana, Spain
- Average visibility in December: 10km
The months with the highest visibility are June, July, August, September, October and December (10km).
The months with the lowest visibility are January, February, March, April, May and November (9km).
