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December Weather in Piedmont, United States

Last updated: June 24, 2025

In Piedmont, United States, the average temperature in December hovers around 9°C (48°F), with a minimum of -6°C (21°F) and a maximum reaching 24°C (75°F). Expect 142 mm (5.6 in) of precipitation spread over approximately 12 days, contributing to the region's average humidity of 88%. Stay prepared for a mix of cool and damp weather!

December Temperature in Piedmont

In December in Piedmont, the average temperature is 9°C (48°F), with maximums reaching 24°C (75°F) and minimums dropping as low as -6°C (21°F). It's advisable to pack layers to comfortably enjoy your travels during this diverse weather.

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

The chart illustrates December temperature patterns in Piedmont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Piedmont, December typically has an average temperature of 9°C (48°F), with highs reaching up to 24°C (75°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec455156627177807975665248
Data source: Temperature data for Piedmont 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 Piedmont

In Piedmont in December, the total precipitation amount is 142 mm (5.6 in), occurring over the course of 12 days.

December Precipitation Trends in Piedmont

The chart displays monthly precipitation patterns in Piedmont, 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 Piedmont, December typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1121681371421051211121449612785142
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Piedmont

In Piedmont in December, humidity is 88%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill settling into your bones, making outdoor exploration feel heavy and oppressive.

December Average Humidity in Piedmont

This chart illustrates the average monthly humidity levels in Piedmont, 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 Piedmont is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%81%77%77%72%73%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Piedmont

In Piedmont 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 Piedmont for better planning.

Maximum UV Index Levels in Piedmont for December

The chart shows the monthly maximum UV Index (UVI) for Piedmont 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 Piedmont typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Piedmont 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 Piedmont Compares to Other Months

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

This table compares monthly weather conditions in Piedmont, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)112 mm (4.4 inches)85%moderate
February Weather10°C (51°F)168 mm (6.6 inches)84%high
March Weather14°C (57°F)137 mm (5.4 inches)82%very high
April Weather17°C (62°F)142 mm (5.6 inches)82%very high
May Weather22°C (72°F)105 mm (4.1 inches)81%extreme
June Weather25°C (77°F)121 mm (4.8 inches)77%extreme
July Weather27°C (80°F)112 mm (4.4 inches)77%extreme
August Weather26°C (79°F)144 mm (5.7 inches)72%extreme
September Weather24°C (75°F)96 mm (3.8 inches)73%very high
October Weather19°C (66°F)127 mm (5.0 inches)73%very high
November Weather11°C (52°F)85 mm (3.3 inches)85%high
December Weather9°C (48°F)142 mm (5.6 inches)88%moderate

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