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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 11°C (52°F), but be prepared for a range that can dip to a chilly -4°C (25°F) and peak at a warm 28°C (82°F). With an expected precipitation amount of 124 mm (4.9 in) spread over about 9 days, and an average humidity level of 88%, it's wise to pack accordingly!

December Temperature in Marion

In December in Marion, the average temperature is 11°C (52°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop as low as -4°C (25°F). This variation in temperatures means travelers should pack layers to stay comfortable regardless of the weather.

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 11°C (52°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec475160647480838279675551
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 124 mm (4.9 in) over the course of 9 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 124 mm (4.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec120178171188141135991017214675124
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 11°C (52°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and the air feel thick, encouraging you to seek shelter or stay hydrated as you explore.

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.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Marion for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111211119864
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 Weather8°C (48°F)119 mm (4.7 inches)84%moderate
February Weather10°C (51°F)178 mm (7.0 inches)83%high
March Weather16°C (61°F)171 mm (6.7 inches)80%very high
April Weather18°C (65°F)188 mm (7.4 inches)82%very high
May Weather23°C (74°F)141 mm (5.6 inches)83%extreme
June Weather27°C (81°F)135 mm (5.3 inches)80%extreme
July Weather28°C (83°F)99 mm (3.9 inches)80%extreme
August Weather28°C (83°F)101 mm (4.0 inches)75%extreme
September Weather26°C (79°F)72 mm (2.8 inches)73%very high
October Weather20°C (68°F)146 mm (5.8 inches)76%very high
November Weather13°C (55°F)75 mm (3.0 inches)84%high
December Weather11°C (52°F)124 mm (4.9 inches)88%moderate

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