December Weather in Clay, United States

Last updated: June 24, 2025

In Clay, United States, the average temperature in December hovers around 4°C (40°F), with extremes ranging from a brisk -15°C (6°F) to a mild 21°C (69°F). Expect 131 mm (5.1 in) of precipitation spread over 14 days, contributing to an average humidity of 86%. Prepare for a cool and damp climate!

December Temperature in Clay

In December in Clay, the average temperature is 4°C (40°F), with maximums reaching 21°C (69°F) and minimums dropping as low as -15°C (6°F). Be prepared for a range of weather conditions, making it essential to pack accordingly for your travels.

December Weather in Clay: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Clay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clay, December typically has an average temperature of 4°C (40°F), with highs reaching up to 21°C (69°F) and lows dropping to around -15°C (6°F).

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

December Precipitation in Clay

In Clay in December, the total precipitation amount is 131 mm (5.1 in) over a span of 14 days.

December Precipitation Trends in Clay

The chart displays monthly precipitation patterns in Clay, 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 Clay, December typically receives around 131 mm (5.1 inches) of precipitation spread over approximately 14 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 Clay

In Clay in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Clay

This chart illustrates the average monthly humidity levels in Clay, 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 Clay 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 Clay

In Clay 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 Clay, you can check the information here.

Maximum UV Index Levels in Clay for December

The chart shows the monthly maximum UV Index (UVI) for Clay 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 Clay typically reaches 3, which falls under the moderate exposure category.

Data source: Clay 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 Clay Compares to Other Months

Weather in Clay varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Clay, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Clay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	107 mm (4.2 inches)	88%	moderate
February Weather	4°C (40°F)	161 mm (6.3 inches)	88%	moderate
March Weather	7°C (46°F)	126 mm (5.0 inches)	88%	high
April Weather	12°C (54°F)	149 mm (5.9 inches)	86%	very high
May Weather	18°C (64°F)	171 mm (6.7 inches)	82%	very high
June Weather	21°C (70°F)	163 mm (6.4 inches)	84%	very high
July Weather	23°C (74°F)	137 mm (5.4 inches)	82%	very high
August Weather	22°C (72°F)	130 mm (5.1 inches)	73%	very high
September Weather	20°C (68°F)	107 mm (4.2 inches)	73%	very high
October Weather	15°C (59°F)	126 mm (5.0 inches)	81%	high
November Weather	7°C (45°F)	87 mm (3.4 inches)	89%	moderate
December Weather	4°C (40°F)	131 mm (5.1 inches)	86%	moderate