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
Weather in December
Temperature
December, having an average high-temperature of 1.3°C (34.3°F) and an average low-temperature of -2.4°C (27.7°F), is the coldest month in Reykjavík, Iceland.Humidity
In December, the average relative humidity is 81%.Rainfall
In Reykjavík, Iceland, during December, the rain falls for 9.7 days and regularly aggregates up to 35mm (1.38") of precipitation. In Reykjavík, Iceland, during the entire year, the rain falls for 166.2 days and collects up to 416mm (16.38") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Reykjavík, in December, during 6.3 snowfall days, 61mm (2.4") of snow is typically accumulated. In Reykjavík, during the entire year, snow falls for 41.1 days and aggregates up to 309mm (12.17") of snow.Sea temperature
In Reykjavík, Iceland, the average seawater temperature in December is 6.7°C (44.1°F).Note: It is risky to swim in 6.7°C (44.1°F). Temperatures beneath 10°C (50°F) induce rapid cold shock and hyperventilation.
Daylight
The month with the shortest days is December, with an average of 4h and 24min of daylight.On the first day of the month, sunrise is at 10:46 and sunset at 15:46. On the last day of December, sunrise is at 11:18 and sunset at 15:42 GMT.
Sunshine
In December, the average sunshine is 2.9h.UV index
In Reykjavík, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What part of the year is the coldest in Reykjavík?
How cold is it in Reykjavík in December?
What is the average humidity in December in Reykjavík?
How much does it rain in Reykjavík in December?
How many days does it snow in December in Reykjavík?
What is the water temperature in December in Reykjavík?
What is the month with the shortest days in Reykjavík?
How many hours of daylight does Reykjavík have in December?
When are sunrise and sunset in December in Reykjavík?
How long on average sun shines in December in Reykjavík?
What is the UV index intensity in December in Reykjavík?
Average temperature in December
Reykjavík, Iceland
- Average high temperature in December: 1.3°C
The warmest month (with the highest average high temperature) is July (13.5°C).
The month with the lowest average high temperature is December (1.3°C).
- Average low temperature in December: -2.4°C
The month with the highest average low temperature is July (9.1°C).
The coldest month (with the lowest average low temperature) is December (-2.4°C).
Average pressure in December
Reykjavík, Iceland
- Average pressure in December: 998.4mbar
The month with the highest atmospheric pressure is June (1013.8mbar).
The month with the lowest atmospheric pressure is January (996.6mbar).
Average wind speed in December
Reykjavík, Iceland
- Average wind speed in December: 23.6km/h
The windiest month (with the highest average wind speed) is February (24.9km/h).
The calmest months (with the lowest average wind speed) are June and July (14.9km/h).
Average humidity in December
Reykjavík, Iceland
- Average humidity in December: 81%
The months with the highest relative humidity are January, February and September (82%).
The month with the lowest relative humidity is May (75%).
Average rainfall in December
Reykjavík, Iceland
- Average rainfall in December: 35mm
The wettest month (with the highest rainfall) is January (47mm).
The driest months (with the least rainfall) are June and July (25mm).
Average rainfall days in December
Reykjavík, Iceland
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is September (17.8 days).
The month with the least rainy days is December (9.7 days).
Average snowfall in December
Reykjavík, Iceland
- Average snowfall in December: 61mm
The month with the highest snowfall is March (100mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Reykjavík, Iceland
- Average snowfall days in December: 6.3 days
The month with the highest number of snowfall days is March (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Reykjavík, Iceland
- Average sea temperature in December: 6.7°C
The best month for swimming (with the highest average sea temperature) is July (11.4°C).
The coldest month (with the lowest average sea temperature) is March (5.1°C).
Average daylight in December /
Average sunshine in December
Reykjavík, Iceland
- Average daylight in December: 4h and 2min
The month with the longest days is June (Average daylight: 20h and 54min).
The month with the shortest days is December (Average daylight: 4h and 24min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is August (Average sunshine: 7h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Reykjavík, Iceland
- Average sunshine days in December: 14.1 days
The month with the most sunshine days is December (14.1 days).
The month with the least sunshine days is September (8.8 days).
Average UV index in December
Reykjavík, 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 and November (UV index 1).
Average cloud cover in December
Reykjavík, Iceland
- Average cloud cover in December: 60
The months with the most cloud cover are March and April (Cloud cover 68).
The months with the least cloud cover are August and December (Cloud cover 60).
Average visibility in December
Reykjavík, Iceland
- Average visibility in December: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
Reykjavík, Iceland
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