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December Weather in Marion, United States

Last updated: June 24, 2025

In December, the average temperature in Marion, United States hovers around -2°C (28°F), with extremes ranging from a chilly -23°C (-10°F) to a milder 15°C (59°F). Expect 66 mm (2.6 in) of precipitation spread over about 11 days, and prepare for a notably high average humidity of 86%. Stay cozy and ready for a mix of winter weather!

December Temperature in Marion

In December in Marion, the average temperature is -2°C (28°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -23°C (-10°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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

The chart illustrates December temperature patterns in Marion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marion, December typically has an average temperature of -2°C (28°F), with highs reaching up to 15°C (59°F) and lows dropping to around -23°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec222333435666726962493528
Data source: Temperature data for Marion 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 Marion

In Marion in December, the precipitation amount is 66 mm (2.6 in) spread over 11 days.

December Precipitation Trends in Marion

The chart displays monthly precipitation patterns in Marion, 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 Marion, December typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec555656971161128396901315866
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Marion

In Marion in December, humidity is 86%. With an average temperature of -2°C (28°F), this humidity feels like a dense fog wrapping around you, making it feel even colder and creating an uncomfortable chill that can dampen any plans for outdoor exploration.

December Average Humidity in Marion

This chart illustrates the average monthly humidity levels in Marion, 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 Marion is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Marion

In Marion 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 Marion, you can visit Hourly UV Index in Marion.

Maximum UV Index Levels in Marion for December

The chart shows the monthly maximum UV Index (UVI) for Marion 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 Marion typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Marion 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 Marion Compares to Other Months

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

This table compares monthly weather conditions in Marion, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)55 mm (2.2 inches)87%low
February Weather-5°C (23°F)56 mm (2.2 inches)87%moderate
March Weather0°C (33°F)56 mm (2.2 inches)86%moderate
April Weather6°C (43°F)97 mm (3.8 inches)87%very high
May Weather14°C (57°F)116 mm (4.5 inches)82%very high
June Weather19°C (67°F)112 mm (4.4 inches)81%very high
July Weather22°C (72°F)83 mm (3.3 inches)78%very high
August Weather21°C (69°F)96 mm (3.8 inches)79%very high
September Weather17°C (62°F)90 mm (3.5 inches)79%high
October Weather10°C (50°F)131 mm (5.2 inches)82%moderate
November Weather2°C (36°F)58 mm (2.3 inches)87%moderate
December Weather-2°C (28°F)66 mm (2.6 inches)86%low

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