December weather forecastHellissandur, Iceland
December
Weather in December
December, the first month of the winter in Hellissandur, is also an icy month, with an average temperature ranging between min 1.6°C (34.9°F) and max 3.8°C (38.8°F).Temperature
Hellissandur's shift into December sets the average high-temperature at a still icy 3.8°C (38.8°F), a figure that deviates only slightly from November's 5.2°C (41.4°F). Maintaining close parity with daytime warmth, the average nocturnal temperature during December stays at a still cold 1.6°C (34.9°F).Humidity
The months with the lowest humidity are March and December, with an average relative humidity of 75%.Rainfall
In Hellissandur, during December, the rain falls for 12.5 days and regularly aggregates up to 74mm (2.91") of precipitation. Throughout the year, in Hellissandur, there are 184.8 rainfall days, and 827mm (32.56") of precipitation is accumulated.Snowfall
Months with snowfall in Hellissandur, Iceland, are January through May, September through December. In Hellissandur, during December, snow falls for 6.8 days and regularly aggregates up to 73mm (2.87") of snow. Throughout the year, in Hellissandur, Iceland, there are 46.9 snowfall days, and 421mm (16.57") of snow is accumulated.Daylight
December has the shortest days of the year in Hellissandur, with an average of 3h and 54min of daylight.On the first day of December, sunrise is at 11:05 and sunset at 15:43. On the last day of the month, sunrise is at 11:40 and sunset at 15:36 GMT.
Sunshine
In Hellissandur, Iceland, the average sunshine in December is 2.6h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Hellissandur. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, Iceland
- Average daylight in December: 3h and 54min
The month with the longest days is June (Average daylight: 21h and 36min).
The month with the shortest days is December (Average daylight: 3h and 54min).
- 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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).
