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December Weather in Mellen, United States

Last updated: June 24, 2025

In Mellen, United States, the average temperature in December hovers around -6°C (21°F). While the mercury can dip as low as -29°C (-21°F), it can also soar up to a maximum of 15°C (59°F). Expect about 68 mm (2.7 in) of precipitation spread over 10 days, contributing to an average humidity of a notable 91%.

December Temperature in Mellen

In December in Mellen, the average temperature is -6°C (21°F). The maximum can reach 15°C (59°F), while the minimum can dip as low as -29°C (-21°F). Travelers should prepare for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Mellen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mellen, December typically has an average temperature of -6°C (21°F), with highs reaching up to 15°C (59°F) and lows dropping to around -29°C (-21°F).
JanFebMarAprMayJunJulAugSepOctNovDec141428395465696659453021
Data source: Temperature data for Mellen 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 Mellen

In Mellen in December, the precipitation amount is 68 mm (2.7 in) over a span of 10 days.

December Precipitation Trends in Mellen

The chart displays monthly precipitation patterns in Mellen, 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 Mellen, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec314652949811595112991005168
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mellen

In Mellen in December humidity is 91%. With an average temperature of -6°C (21°F), this humidity feels like wandering through a cold, damp fog that clings to your skin, making it challenging to stay warm and comfortable while exploring the surroundings.

December Average Humidity in Mellen

This chart illustrates the average monthly humidity levels in Mellen, 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 Mellen is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mellen

In Mellen in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Mellen, you can visit Hourly UV Index in Mellen.

Maximum UV Index Levels in Mellen for December

The chart shows the monthly maximum UV Index (UVI) for Mellen 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 Mellen typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810987532
Data source: Mellen 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 Mellen Compares to Other Months

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

This table compares monthly weather conditions in Mellen, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)31 mm (1.2 inches)93%low
February Weather-10°C (15°F)46 mm (1.8 inches)93%moderate
March Weather-2°C (28°F)52 mm (2.0 inches)89%moderate
April Weather4°C (39°F)94 mm (3.7 inches)85%high
May Weather12°C (55°F)98 mm (3.9 inches)76%very high
June Weather18°C (66°F)115 mm (4.5 inches)71%very high
July Weather21°C (70°F)95 mm (3.7 inches)70%very high
August Weather19°C (66°F)112 mm (4.4 inches)71%very high
September Weather15°C (59°F)98 mm (3.9 inches)73%high
October Weather7°C (45°F)100 mm (3.9 inches)81%moderate
November Weather-1°C (30°F)51 mm (2.0 inches)87%moderate
December Weather-6°C (21°F)68 mm (2.7 inches)91%low

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