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December Weather in Rotnes, Norway

Last updated: August 27, 2025

In December, the average temperature in Rotnes, Norway hovers around -2°C (28°F). However, temperatures can fluctuate significantly, with minimums falling as low as -16°C (3°F) and maximums reaching up to 7°C (45°F). Expect 107 mm (4.2 in) of precipitation over approximately 16 days, and brace yourself for high humidity levels at 93%, making this month a true test of winter resilience.

December Temperature in Rotnes

In December in Rotnes, the average temperature is -2°C (28°F), with maximums reaching 7°C (45°F) and minimums dropping as low as -16°C (3°F). Travelers should be prepared for cold weather and dress warmly when visiting during this time.

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

The chart illustrates December temperature patterns in Rotnes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rotnes, December typically has an average temperature of -2°C (28°F), with highs reaching up to 7°C (45°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec272733415161636053443628
Data source: Temperature data for Rotnes 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 Rotnes

In Rotnes in December, the precipitation amount reaches 107 mm (4.2 in) during a span of 16 days.

December Precipitation Trends in Rotnes

The chart displays monthly precipitation patterns in Rotnes, 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 Rotnes, December typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec606465389086103100106130107107
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rotnes

In Rotnes in December, the humidity is 93%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that seeps into your bones, making traveling feel uncomfortable and heavy as you contend with the dampness in the air, creating a stark contrast to the freezing temperatures.

December Average Humidity in Rotnes

This chart illustrates the average monthly humidity levels in Rotnes, 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 Rotnes is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%89%82%73%71%72%77%86%92%93%93%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rotnes

In Rotnes 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 Rotnes.

Maximum UV Index Levels in Rotnes for December

The chart shows the monthly maximum UV Index (UVI) for Rotnes 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 Rotnes typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Rotnes 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 Rotnes Compares to Other Months

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

This table compares monthly weather conditions in Rotnes, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)60 mm (2.4 inches)94%low
February Weather-3°C (27°F)64 mm (2.5 inches)92%low
March Weather0°C (33°F)65 mm (2.5 inches)89%moderate
April Weather5°C (41°F)38 mm (1.5 inches)82%moderate
May Weather10°C (51°F)90 mm (3.5 inches)73%moderate
June Weather16°C (61°F)86 mm (3.4 inches)71%high
July Weather17°C (63°F)103 mm (4.1 inches)72%high
August Weather15°C (60°F)100 mm (3.9 inches)77%moderate
September Weather12°C (53°F)106 mm (4.2 inches)86%moderate
October Weather7°C (44°F)130 mm (5.1 inches)92%low
November Weather2°C (36°F)107 mm (4.2 inches)93%low
December Weather-2°C (28°F)107 mm (4.2 inches)93%low

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