December Weather in Marion, United States

Last updated: June 24, 2025

In Marion, United States, the average temperature in December hovers around 8°C (47°F), with a range that can dip to a chilling -10°C (15°F) and spike to a warm 26°C (78°F). Prepare for some wet days ahead, as 148 mm (5.8 in) of precipitation is expected over about 10 days. Don't forget your umbrella, as the average humidity is quite high at 88%!

December Temperature in Marion

In December in Marion, the average temperature is 8°C (47°F), with maximums reaching 26°C (78°F) and minimums dropping as low as -10°C (15°F). This diverse weather makes it essential for travelers to prepare for both warm and chilly 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 8°C (47°F), with highs reaching up to 26°C (78°F) and lows dropping to around -10°C (15°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 148 mm (5.8 in) recorded 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 148 mm (5.8 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 88%. With an average temperature of 8°C (47°F), this humidity feels like a thick, damp blanket wrapping around you, making even short walks feel heavy and uninviting for travel.

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.

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.

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	5°C (42°F)	105 mm (4.1 inches)	84%	moderate
February Weather	7°C (46°F)	165 mm (6.5 inches)	83%	high
March Weather	13°C (55°F)	160 mm (6.3 inches)	81%	very high
April Weather	16°C (61°F)	133 mm (5.2 inches)	81%	very high
May Weather	22°C (72°F)	124 mm (4.9 inches)	83%	extreme
June Weather	26°C (79°F)	116 mm (4.6 inches)	83%	extreme
July Weather	28°C (82°F)	125 mm (4.9 inches)	81%	extreme
August Weather	26°C (80°F)	114 mm (4.5 inches)	74%	very high
September Weather	24°C (76°F)	79 mm (3.1 inches)	71%	very high
October Weather	18°C (65°F)	115 mm (4.5 inches)	76%	high
November Weather	10°C (51°F)	80 mm (3.1 inches)	84%	moderate
December Weather	8°C (47°F)	148 mm (5.8 inches)	88%	moderate