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December Weather in Seltjarnarnes, Iceland

Last updated: August 23, 2025

In Seltjarnarnes, Iceland, the weather in December can be quite chilly, with an average temperature of 0°C (33°F). Expect temperatures to dip to a minimum of -13°C (9°F) and occasionally reach a maximum of 10°C (50°F). Be prepared for precipitation averaging 106 mm (4.2 in) over about 17 days of the month, and brace yourself for a high average humidity of 95%.

December Temperature in Seltjarnarnes

In December in Seltjarnarnes, the average temperature is 0°C (33°F), with maximums reaching 10°C (50°F) and minimums dropping as low as -13°C (9°F). Travelers should be prepared for chilly conditions and dress in warm layers when visiting during this time.

December Weather in Seltjarnarnes: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Seltjarnarnes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seltjarnarnes, December typically has an average temperature of 0°C (33°F), with highs reaching up to 10°C (50°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec323234394449525247413533
Data source: Temperature data for Seltjarnarnes generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Seltjarnarnes

In Seltjarnarnes in December, the precipitation amount is 106 mm (4.2 in) spread over 17 days.

December Precipitation Trends in Seltjarnarnes

The chart displays monthly precipitation patterns in Seltjarnarnes, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Seltjarnarnes, December typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec11412510312111392758316496105106
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Seltjarnarnes

In Seltjarnarnes in December, humidity is 95%. With an average temperature of 0°C (33°F), this humidity feels like you are wrapped in a cold, damp blanket, making travel uncomfortable and chilling to the bone.

December Average Humidity in Seltjarnarnes

This chart illustrates the average monthly humidity levels in Seltjarnarnes, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Seltjarnarnes is approximately 95%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%95%94%87%85%81%86%88%92%93%94%95%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Seltjarnarnes

In Seltjarnarnes in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Seltjarnarnes.

Maximum UV Index Levels in Seltjarnarnes for December

The chart shows the monthly maximum UV Index (UVI) for Seltjarnarnes in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Seltjarnarnes typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112356643211
Data source: Seltjarnarnes December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Seltjarnarnes Compares to Other Months

Weather in Seltjarnarnes varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Seltjarnarnes, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Seltjarnarnes, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)113 mm (4.5 inches)96%low
February Weather0°C (33°F)125 mm (4.9 inches)95%low
March Weather1°C (34°F)103 mm (4.1 inches)94%low
April Weather4°C (40°F)121 mm (4.8 inches)87%moderate
May Weather7°C (44°F)113 mm (4.4 inches)85%moderate
June Weather9°C (49°F)92 mm (3.6 inches)81%high
July Weather11°C (53°F)75 mm (3.0 inches)86%high
August Weather11°C (52°F)83 mm (3.3 inches)88%moderate
September Weather8°C (47°F)164 mm (6.5 inches)92%moderate
October Weather5°C (42°F)96 mm (3.8 inches)93%low
November Weather2°C (35°F)105 mm (4.1 inches)94%low
December Weather0°C (33°F)106 mm (4.2 inches)95%low

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