December weather forecastGrindavik, Iceland
December
Weather in December
December in Grindavik welcomes winter in full swing, with the temperature dropping to its lowest at 1.3°C (34.3°F). Despite the cold, spirits remain high as festive decorations light up the city in preparation for the holiday season. The geothermal pools, illuminated with fairy lights, offer a beautiful contrast to the harsh winter weather. Snowfall increases to 52mm (2.05"), ideal for those looking to experience a winter wonderland. While December may herald the arrival of the coldest conditions, the charming wintry aesthetic of Grindavik, enhanced by the frequent sightings of Northern Lights, makes it an enchanting time to visit.Temperature
During February, March and December, Grindavik registers its lowest temperatures, averaging a high of 4.2°C (39.6°F).Humidity
With an average relative humidity of 74%, December is the least humid month.Rainfall
In December, the rain falls for 13.4 days. Throughout December, 69mm (2.72") of precipitation is accumulated. In Grindavik, during the entire year, the rain falls for 193.9 days and collects up to 833mm (32.8") of precipitation.Snowfall
Months with snowfall in Grindavik are January through May, October through December. In Grindavik, during December, snow falls for 5.5 days and regularly aggregates up to 52mm (2.05") of snow. In Grindavik, during the entire year, snow falls for 33.4 days and aggregates up to 297mm (11.69") of snow.Sea temperature
In December, the average sea temperature in Grindavik is 7.2°C (45°F).Note: Swimming in 7.2°C (45°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience.
Daylight
December has the shortest days of the year in Grindavik, with an average of 4h and 30min of daylight.On the first day of the month, sunrise is at 10:45 and sunset at 15:52. On the last day of December, in Grindavik, Iceland, sunrise is at 11:16 and sunset at 15:49 GMT.
Sunshine
In Grindavik, Iceland, the average sunshine in December is 2.7h.UV index
The months with the lowest UV index are January through May, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Consider carefully! The reflective quality of 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
Average temperature in December
Grindavik, Iceland
- Average high temperature in December: 4.2°C
The warmest months (with the highest average high temperature) are July and August (12.2°C).
The months with the lowest average high temperature are February, March and December (4.2°C).
- Average low temperature in December: 1.3°C
The month with the highest average low temperature is July (9.9°C).
The coldest months (with the lowest average low temperature) are March and December (1.3°C).
Average pressure in December
Grindavik, Iceland
- Average pressure in December: 998mbar
The month with the highest atmospheric pressure is June (1013.7mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).
Average wind speed in December
Grindavik, Iceland
- Average wind speed in December: 34.1km/h
The windiest month (with the highest average wind speed) is February (35km/h).
The calmest month (with the lowest average wind speed) is June (20.1km/h).
Average humidity in December
Grindavik, Iceland
- Average humidity in December: 74%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is December (74%).
Average rainfall in December
Grindavik, Iceland
- Average rainfall in December: 69mm
The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is June (35mm).
Average rainfall days in December
Grindavik, Iceland
- Average rainfall days in December: 13.4 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is June (12.5 days).
Average snowfall in December
Grindavik, Iceland
- Average snowfall in December: 52mm
The month with the highest snowfall is March (75mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Grindavik, Iceland
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Grindavik, Iceland
- Average sea temperature in December: 7.2°C
The best month for swimming (with the highest average sea temperature) is July (11.7°C).
The coldest month (with the lowest average sea temperature) is March (5.8°C).
Average daylight in December /
Average sunshine in December
Grindavik, Iceland
- Average daylight in December: 4h and 30min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in December: 2h and 42min
The month with the most sunshine is August (Average sunshine: 7h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Grindavik, Iceland
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is June (15 days).
The months with the least sunshine days are March and April (7.1 days).
Average UV index in December
Grindavik, Iceland
- Average UV index in December: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 2).
Average cloud cover in December
Grindavik, Iceland
- Average cloud cover in December: 61
The month with the most cloud cover is March (Cloud cover 69).
The months with the least cloud cover are May, July and August (Cloud cover 60).
Average visibility in December
Grindavik, Iceland
- Average visibility in December: 9km
The months with the highest visibility are June and August (10km).
The months with the lowest visibility are January, February, March, April, May, July, September, October, November and December (9km).
