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December Weather in Clayton, United States

Last updated: June 24, 2025

In Clayton, United States, the average temperature in December hovers around 8°C (47°F), making it a cool time of year. Temperatures can dip as low as -7°C (20°F), while occasionally peaking at 26°C (78°F). Expect 100 mm (4.0 in) of precipitation over 8 days, paired with an average humidity of a humid 87%. Whether you thrive in chilly conditions or prefer a warmer climate, Clayton offers a diverse range of weather this month!

December Temperature in Clayton

In December in Clayton, the average temperature is 8°C (47°F). Maximum temperatures can reach 26°C (78°F), while minimums can drop as low as -7°C (20°F). Be prepared for a wide range of weather conditions when traveling during this time.

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

The chart illustrates December temperature patterns in Clayton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clayton, 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 -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec424456617078818076635247
Data source: Temperature data for Clayton 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 Clayton

In Clayton in December, the precipitation amount is 100 mm (4.0 in) distributed over a span of 8 days.

December Precipitation Trends in Clayton

The chart displays monthly precipitation patterns in Clayton, 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 Clayton, December typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8312713314919791781037415967100
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Clayton

In Clayton in December, humidity is 87%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortably muggy despite the cool air.

December Average Humidity in Clayton

This chart illustrates the average monthly humidity levels in Clayton, 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 Clayton is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%75%75%83%82%78%68%64%71%82%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Clayton

In Clayton 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 Clayton for better planning.

Maximum UV Index Levels in Clayton for December

The chart shows the monthly maximum UV Index (UVI) for Clayton 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 Clayton typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010854
Data source: Clayton 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 Clayton Compares to Other Months

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

This table compares monthly weather conditions in Clayton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)83 mm (3.3 inches)79%moderate
February Weather7°C (45°F)127 mm (5.0 inches)78%high
March Weather13°C (56°F)133 mm (5.2 inches)75%very high
April Weather16°C (61°F)149 mm (5.9 inches)75%very high
May Weather21°C (70°F)197 mm (7.8 inches)83%extreme
June Weather26°C (78°F)91 mm (3.6 inches)81%extreme
July Weather27°C (82°F)78 mm (3.1 inches)78%extreme
August Weather27°C (81°F)103 mm (4.1 inches)68%very high
September Weather24°C (76°F)74 mm (2.9 inches)64%very high
October Weather17°C (64°F)159 mm (6.2 inches)71%very high
November Weather11°C (52°F)67 mm (2.6 inches)82%moderate
December Weather8°C (47°F)100 mm (4.0 inches)87%moderate

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