December Weather in Marion, United States

Last updated: June 24, 2025

In December, the average temperature in Marion, United States hovers around 10°C (51°F). Expect minimums dipping to -6°C (21°F) and maximums soaring to 27°C (80°F). Over the month, precipitation totals about 132 mm (5.2 in) across 10 days, contributing to an average humidity level of 86%. Prepare for a blend of chilly and warm spells amid a moist atmosphere!

December Temperature in Marion

In December in Marion, the average temperature is 10°C (51°F), with maximums reaching up to 27°C (80°F) and minimums dropping as low as -6°C (21°F). This means travelers should prepare for a wide range of weather conditions, making it essential to pack layers for comfort.

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 10°C (51°F), with highs reaching up to 27°C (80°F) and lows dropping to around -6°C (21°F).

Data source: Temperature data for Marion generated using information from the Copernicus Climate Change Service.

December Precipitation in Marion

In Marion in December, the total precipitation amount is 132 mm (5.2 in) over a span of 10 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 132 mm (5.2 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Marion

In Marion in December humidity is 86%. With an average temperature of 10°C (51°F), this humidity feels like a cool, damp blanket enveloping you, making traveling feel invigorating yet slightly uncomfortable without the right layers.

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.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	76 mm (3.0 inches)	85%	moderate
February Weather	12°C (53°F)	94 mm (3.7 inches)	82%	high
March Weather	14°C (57°F)	66 mm (2.6 inches)	81%	very high
April Weather	18°C (65°F)	94 mm (3.7 inches)	80%	very high
May Weather	23°C (74°F)	117 mm (4.6 inches)	81%	extreme
June Weather	25°C (78°F)	144 mm (5.7 inches)	81%	extreme
July Weather	27°C (81°F)	144 mm (5.7 inches)	81%	extreme
August Weather	27°C (80°F)	163 mm (6.4 inches)	80%	very high
September Weather	25°C (77°F)	162 mm (6.4 inches)	79%	very high
October Weather	20°C (69°F)	53 mm (2.1 inches)	80%	very high
November Weather	12°C (55°F)	81 mm (3.2 inches)	85%	high
December Weather	10°C (51°F)	132 mm (5.2 inches)	86%	moderate