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 tends to be the coldest month, with temperatures averaging a daily high of 0.7°C (33.3°F) and a low of -1.8°C (28.8°F).Humidity
In Stykkishólmur, the average relative humidity in December is 82%.Rainfall
In Stykkishólmur, during December, the rain falls for 9.9 days and regularly aggregates up to 33mm (1.3") of precipitation. In Stykkishólmur, during the entire year, the rain falls for 139.6 days and collects up to 351mm (13.82") of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 10.5 days. Throughout December, 57mm (2.24") of snow is accumulated. In Stykkishólmur, during the entire year, snow falls for 64.8 days and aggregates up to 403mm (15.87") of snow.Sea temperature
In December, the average sea temperature is 4.8°C (40.6°F).Note: Within the context of swimming, this state is extremely cold, dangerous, and can result in death. Hypothermia happens quickly in the absence of protective insulated waterproof clothing.
Daylight
With an average of 3h and 48min of daylight, December has the shortest days of the year in Stykkishólmur.On the first day of December in Stykkishólmur, sunrise is at 11:03 and sunset at 15:36. On the last day of the month, sunrise is at 11:38 and sunset at 15:29 GMT.
Sunshine
In Stykkishólmur, the average sunshine in December is 2.6h.UV index
The months with the lowest UV index in Stykkishólmur, Iceland, are January, February, April, October through December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 1 translates into these guidelines:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Stykkishólmur?
How cold is December in Stykkishólmur?
What is the average humidity in December in Stykkishólmur?
How much does it rain in Stykkishólmur in December?
How much does it snow in Stykkishólmur in December?
What is the sea temperature in December in Stykkishólmur?
What is the month with the shortest days in Stykkishólmur?
How many hours of daylight does Stykkishólmur have in December?
When is the sunrise / sunset in December in Stykkishólmur?
How long on average sun shines in December in Stykkishólmur?
What is the month with the lowest UV index in Stykkishólmur?
What is the UV index reading in December in Stykkishólmur?
Average temperature in December
Stykkishólmur, Iceland
- Average high temperature in December: 0.7°C
The warmest month (with the highest average high temperature) is July (12.1°C).
The month with the lowest average high temperature is December (0.7°C).
- Average low temperature in December: -1.8°C
The month with the highest average low temperature is July (8.3°C).
The coldest months (with the lowest average low temperature) are February and December (-1.8°C).
Average pressure in December
Stykkishólmur, Iceland
- Average pressure in December: 998.9mbar
The month with the highest atmospheric pressure is June (1014.1mbar).
The month with the lowest atmospheric pressure is January (996.7mbar).
Average wind speed in December
Stykkishólmur, Iceland
- Average wind speed in December: 25.8km/h
The windiest month (with the highest average wind speed) is February (25.9km/h).
The calmest month (with the lowest average wind speed) is June (14.6km/h).
Average humidity in December
Stykkishólmur, Iceland
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and October (83%).
The month with the lowest relative humidity is May (77%).
Average rainfall in December
Stykkishólmur, Iceland
- Average rainfall in December: 33mm
The wettest month (with the highest rainfall) is January (40mm).
The driest month (with the least rainfall) is July (17mm).
Average rainfall days in December
Stykkishólmur, Iceland
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is October (15.7 days).
The month with the least rainy days is February (9.1 days).
Average snowfall in December
Stykkishólmur, Iceland
- Average snowfall in December: 57mm
The month with the highest snowfall is March (97mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Stykkishólmur, Iceland
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are July and August (0 days).
Average sea temperature in December
Stykkishólmur, Iceland
- Average sea temperature in December: 4.8°C
The best month for swimming (with the highest average sea temperature) is August (10.3°C).
The coldest month (with the lowest average sea temperature) is March (2.1°C).
Average daylight in December /
Average sunshine in December
Stykkishólmur, Iceland
- Average daylight in December: 3h and 5min
The month with the longest days is June (Average daylight: 21h and 42min).
The month with the shortest days is December (Average daylight: 3h and 48min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is May (Average sunshine: 7h and 18min).
The month with the least sunshine is June (Average sunshine: 0h and 48min).
Average sunshine days in December
Stykkishólmur, Iceland
- Average sunshine days in December: 10 days
The months with the most sunshine days are June and July (16.8 days).
The month with the least sunshine days is March (9.1 days).
Average UV index in December
Stykkishólmur, Iceland
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 3).
The months with the lowest UV index are January, February, April, October, November and December (UV index 1).
Average cloud cover in December
Stykkishólmur, Iceland
- Average cloud cover in December: 64
The month with the most cloud cover is March (Cloud cover 72).
The months with the least cloud cover are May and June (Cloud cover 61).
Average visibility in December
Stykkishólmur, Iceland
- Average visibility in December: 9km
The months with the highest visibility are June and July (10km).
The months with the lowest visibility are January, February, March, April, May, August, September, October, November and December (9km).
Stykkishólmur, Iceland
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