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
December
Weather in December
Temperature
An average high-temperature of a freezing cold -0.9°C (30.4°F) marks December, exhibiting a close resemblance to the conditions in November. During December, Úlfsá's nights hold steady with an average temperature of -4.3°C (24.3°F), barely dropping from the daytime highs.Humidity
January, February, October and December, with an average relative humidity of 88%, are the most humid months.Rainfall
In December, the rain falls for 6.5 days. Throughout December, 81mm (3.19") of precipitation is accumulated. Throughout the year, there are 124.6 rainfall days, and 664mm (26.14") of precipitation is accumulated.Snowfall
January through June, August through December are months with snowfall. In Úlfsá, in December, during 12 snowfall days, 170mm (6.69") of snow is typically accumulated. Throughout the year, there are 96.2 snowfall days, and 1214mm (47.8") of snow is accumulated.Sea temperature
In Úlfsá, in December, the average water temperature is 4°C (39.2°F).Note: In water-based activities like swimming, this poses significant life risks. The cold water results in agonizing discomfort and quick hyperventilation. A specialized swimsuit is crucial to reduce the potential thermal damage.
Daylight
December has the shortest days of the year, with an average of 3h and 6min of daylight.On the first day of the month, sunrise is at 11:22 and sunset at 15:21. On the last day of December, sunrise is at 12:02 and sunset at 15:09 GMT.
Sunshine
In December, the average sunshine is 0.9h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 1 suggests these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. 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. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the water temperature in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Úlfsá, Iceland
- Average high temperature in December: -0.9°C
The warmest month (with the highest average high temperature) is July (9.5°C).
The month with the lowest average high temperature is March (-1°C).
- Average low temperature in December: -4.3°C
The month with the highest average low temperature is July (6.3°C).
The coldest month (with the lowest average low temperature) is December (-4.3°C).
Average pressure in December
Úlfsá, Iceland
- Average pressure in December: 999.7mbar
The month with the highest atmospheric pressure is June (1014.7mbar).
The month with the lowest atmospheric pressure is January (997.3mbar).
Average wind speed in December
Úlfsá, Iceland
- Average wind speed in December: 25.2km/h
The windiest months (with the highest average wind speed) are February and December (25.2km/h).
The calmest month (with the lowest average wind speed) is June (13.4km/h).
Average humidity in December
Úlfsá, Iceland
- Average humidity in December: 88%
The months with the highest relative humidity are January, February, October and December (88%).
The month with the lowest relative humidity is June (81%).
Average rainfall in December
Úlfsá, Iceland
- Average rainfall in December: 81mm
The wettest month (with the highest rainfall) is January (88mm).
The driest month (with the least rainfall) is June (20mm).
Average rainfall days in December
Úlfsá, Iceland
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is December (6.5 days).
Average snowfall in December
Úlfsá, Iceland
- Average snowfall in December: 170mm
The month with the highest snowfall is March (249mm).
The month with the least snowfall is July (0mm).
Average snowfall days in December
Úlfsá, Iceland
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is March (17.5 days).
The month with the least snowfall days is July (0 days).
Average sea temperature in December
Úlfsá, Iceland
- Average sea temperature in December: 4°C
The best months for swimming (with the highest average sea temperature) are July and August (7°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (3°C).
Average daylight in December /
Average sunshine in December
Úlfsá, Iceland
- Average daylight in December: 3h and 1min
The month with the longest days is July (Average daylight: 21h and 0min).
The month with the shortest days is December (Average daylight: 3h and 6min).
- Average sunshine in December: 0h and 5min
The month with the most sunshine is August (Average sunshine: 5h and 48min).
The month with the least sunshine is June (Average sunshine: 0h and 24min).
Average sunshine days in December
Úlfsá, Iceland
- Average sunshine days in December: 8.8 days
The month with the most sunshine days is June (18 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in December
Úlfsá, Iceland
- Average UV index in December: 1
The month with the highest UV index is July (UV index 3).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in December
Úlfsá, Iceland
- Average cloud cover in December: 77
The month with the most cloud cover is March (Cloud cover 81).
The month with the least cloud cover is June (Cloud cover 65).
Average visibility in December
Úlfsá, Iceland
- Average visibility in December: 8km
The months with the highest visibility are May, June, July, August, September and October (9km).
The months with the lowest visibility are January, February, March, April, November and December (8km).
