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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 -7°C (20°F). Expect chilly conditions, with temperatures dipping as low as -26°C (-15°F) and reaching a maximum of 11°C (52°F). During this time, precipitation totals 68 mm (2.7 in) across 11 days, contributing to the high average humidity of 88%. Stay warm and prepared for the elements!

December Temperature in Marion

In December in Marion, the average temperature is -7°C (20°F). The maximum can reach 11°C (52°F), while the minimum can drop as low as -26°C (-15°F). It's essential to prepare for a wide range of temperatures if you're planning to travel during this time.

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 -7°C (20°F), with highs reaching up to 11°C (52°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec212331344357656354382920
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 total precipitation amount is 68 mm (2.7 in) spread over a duration of 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 68 mm (2.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec728682626630364343535668
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 88%. With an average temperature of -7°C (20°F), this humidity feels like a biting, cold dampness that seeps into your clothes, making every step outside a struggle against the relentless chill and moisture that seems to cling to your skin.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
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 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Marion, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111212121110753
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 (21°F)72 mm (2.8 inches)91%moderate
February Weather-5°C (23°F)86 mm (3.4 inches)92%high
March Weather0°C (32°F)82 mm (3.2 inches)84%very high
April Weather1°C (35°F)62 mm (2.5 inches)74%extreme
May Weather6°C (43°F)66 mm (2.6 inches)62%extreme
June Weather14°C (57°F)30 mm (1.2 inches)56%extreme
July Weather18°C (65°F)36 mm (1.4 inches)44%extreme
August Weather17°C (63°F)43 mm (1.7 inches)37%extreme
September Weather12°C (54°F)43 mm (1.7 inches)46%very high
October Weather3°C (38°F)53 mm (2.1 inches)67%high
November Weather-2°C (29°F)56 mm (2.2 inches)84%moderate
December Weather-7°C (20°F)68 mm (2.7 inches)88%moderate

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