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December Weather in Marion, United States

Last updated: June 24, 2025

In Marion, United States, the average temperature in December hovers around 3°C (38°F). Be prepared for a temperature range that can dip to a chilling -15°C (5°F) or soar to a pleasant 23°C (74°F). During this month, expect approximately 29 mm (1.1 in) of precipitation over just 3 days, with an average humidity level of 84%. Stay cozy and plan your activities accordingly!

December Temperature in Marion

In December in Marion, the average temperature is 3°C (38°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -15°C (5°F). Be prepared for a wide range of temperatures when traveling to Marion during this month.

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 3°C (38°F), with highs reaching up to 23°C (74°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec333447556577807772574538
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 29 mm (1.1 in) over the course of 3 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 29 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec353281791709277135841042829
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 84%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as the cold air clings to you and the moisture creates an oppressive heaviness in the atmosphere.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109743
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 Weather0°C (33°F)35 mm (1.4 inches)76%moderate
February Weather1°C (34°F)32 mm (1.2 inches)77%high
March Weather8°C (48°F)81 mm (3.2 inches)70%high
April Weather13°C (55°F)79 mm (3.1 inches)73%very high
May Weather19°C (66°F)170 mm (6.7 inches)82%very high
June Weather25°C (78°F)92 mm (3.6 inches)82%extreme
July Weather27°C (80°F)77 mm (3.0 inches)81%extreme
August Weather25°C (77°F)135 mm (5.3 inches)78%very high
September Weather22°C (72°F)84 mm (3.3 inches)71%very high
October Weather14°C (57°F)104 mm (4.1 inches)71%high
November Weather7°C (45°F)28 mm (1.1 inches)81%moderate
December Weather3°C (38°F)29 mm (1.1 inches)84%moderate

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