December weather forecastBilbao, Spain
December
Weather in December
Closing out the year, December in Bilbao signals the arrival of winter with average temperatures plummeting to 8.1°C (46.6°F). The city records 2mm (0.08") of snow, rain increases to 54mm (2.13"), and the daylight hours hover around nine, marking the shortest day of the year. Bilbao takes on a festive mood as winter sets in, beautifully illuminated streets and decorated landmarks capturing the city's festive spirit. Despite the cold and wet weather, the lure of winter festivities keeps the city buzzing with joyful activity as residents and tourists alike welcome the New Year.Temperature
Bilbao observes an average high-temperature of a cool 12.2°C (54°F) in December, barely different from 14.5°C (58.1°F) in November. In Bilbao, the nighttime temperature in December descends gently to an average of 8.1°C (46.6°F).Humidity
The average relative humidity in December is 75%.Rainfall
In Bilbao, in December, during 16.5 rainfall days, 54mm (2.13") of precipitation is typically accumulated. In Bilbao, Spain, during the entire year, the rain falls for 198.1 days and collects up to 634mm (24.96") of precipitation.Snowfall
Months with snowfall in Bilbao are January through March and December. December is the first month it typically snows in Bilbao, Spain. Throughout December, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow. In Bilbao, Spain, during the entire year, snow falls for 2.4 days and aggregates up to 20mm (0.79") of snow.Sea temperature
In Bilbao, in December, the average water temperature is 13°C (55.4°F).Note: Immersing oneself in 13°C (55.4°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 08:24 and sunset at 17:37. On the last day of the month, sunrise is at 08:43 and sunset at 17:46 CET.
Sunshine
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 Bilbao, Spain. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bilbao, Spain
- Average high temperature in December: 12.2°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in December: 8.1°C
The month with the highest average low temperature is August (16.9°C).
The coldest month (with the lowest average low temperature) is February (6.5°C).
Average pressure in December
Bilbao, 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 (1015.6mbar).
Average wind speed in December
Bilbao, Spain
- Average wind speed in December: 16.1km/h
The windiest month (with the highest average wind speed) is February (17.2km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in December
Bilbao, Spain
- Average humidity in December: 75%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Bilbao, Spain
- Average rainfall in December: 54mm
The wettest month (with the highest rainfall) is November (103mm).
The driest month (with the least rainfall) is September (31mm).
Average rainfall days in December
Bilbao, Spain
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is January (18.6 days).
The month with the least rainy days is October (12.7 days).
Average snowfall in December
Bilbao, Spain
- Average snowfall in December: 2mm
The month with the highest snowfall is February (12mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Bilbao, Spain
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.2 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
Bilbao, Spain
- Average sea temperature in December: 13°C
The best month for swimming (with the highest average sea temperature) is August (21°C).
The coldest months (with the lowest average sea temperature) are February and March (12°C).
Average daylight in December /
Average sunshine in December
Bilbao, Spain
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 24min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 12min).
Average sunshine days in December
Bilbao, Spain
- Average sunshine days in December: 12.2 days
The month with the most sunshine days is October (15.4 days).
The month with the least sunshine days is May (8.8 days).
Average UV index in December
Bilbao, 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
Bilbao, 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
Bilbao, Spain
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
