December weather forecastHellnar, Iceland
December
Weather in December
The first month of the winter, December, is also a wintry month in Hellnar, Iceland, with temperature in the range of an average low of 1.6°C (34.9°F) and an average high of 3.8°C (38.8°F).Temperature
The arrival of December records an average high-temperature of a still wintry 3.8°C (38.8°F), closely related to the 5.2°C (41.4°F) observed in November. Hellnar indicates a consistently low-temperature of 1.6°C (34.9°F) during the nights of December.Humidity
The months with the lowest humidity in Hellnar, Iceland, are March and December, with an average relative humidity of 75%.Rainfall
In Hellnar, in December, during 12.5 rainfall days, 74mm (2.91") of precipitation is typically accumulated. In Hellnar, during the entire year, the rain falls for 184.8 days and collects up to 827mm (32.56") of precipitation.Snowfall
Months with snowfall in Hellnar are January through May, September through December. In December, it is snowing for 6.8 days. Throughout December, 73mm (2.87") of snow is accumulated. Throughout the year, there are 46.9 snowfall days, and 421mm (16.57") of snow is accumulated.Daylight
With an average of 4h and 0min of daylight, December has the shortest days of the year in Hellnar.On the first day of December, sunrise is at 11:02 and sunset at 15:45. On the last day of the month, sunrise is at 11:36 and sunset at 15:39 GMT.
Sunshine
The average sunshine in December is 2.6h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hellnar, Iceland
- Average high temperature in December: 3.8°C
The warmest month (with the highest average high temperature) is August (11.3°C).
The month with the lowest average high temperature is March (3.3°C).
- Average low temperature in December: 1.6°C
The months with the highest average low temperature are July and August (9.3°C).
The coldest month (with the lowest average low temperature) is March (0.8°C).
Average pressure in December
Hellnar, Iceland
- Average pressure in December: 998.4mbar
The month with the highest atmospheric pressure is June (1014.1mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).
Average wind speed in December
Hellnar, Iceland
- Average wind speed in December: 36.3km/h
The windiest month (with the highest average wind speed) is February (36.4km/h).
The calmest month (with the lowest average wind speed) is June (19.4km/h).
Average humidity in December
Hellnar, Iceland
- Average humidity in December: 75%
The months with the highest relative humidity are June and July (82%).
The months with the lowest relative humidity are March and December (75%).
Average rainfall in December
Hellnar, Iceland
- Average rainfall in December: 74mm
The wettest month (with the highest rainfall) is January (96mm).
The driest month (with the least rainfall) is June (37mm).
Average rainfall days in December
Hellnar, Iceland
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is February (12.2 days).
Average snowfall in December
Hellnar, Iceland
- Average snowfall in December: 73mm
The month with the highest snowfall is March (99mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in December
Hellnar, Iceland
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is March (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Hellnar, Iceland
- Average daylight in December: 4h and 0min
The month with the longest days is June (Average daylight: 21h and 24min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in December: 2h and 36min
The month with the most sunshine is August (Average sunshine: 7h and 48min).
The month with the least sunshine is June (Average sunshine: 0h and 54min).
Average sunshine days in December
Hellnar, Iceland
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is July (14.2 days).
The month with the least sunshine days is January (4.7 days).
Average UV index in December
Hellnar, Iceland
- Average UV index in December: 1
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Hellnar, Iceland
- Average cloud cover in December: 65
The month with the most cloud cover is March (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 56).
Average visibility in December
Hellnar, Iceland
- Average visibility in December: 8km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March and December (8km).
