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December Weather in Piedmont, United States

Last updated: June 24, 2025

In December, the average temperature in Piedmont, United States hovers around 5°C (41°F), with a minimum drop to -13°C (9°F) and a comfortable maximum of 25°C (76°F). Expect about 77 mm (3.0 in) of precipitation over 8 days, accompanied by a high average humidity of 86%. Stay prepared for a variety of weather conditions!

December Temperature in Piedmont

In December in Piedmont, the average temperature is 5°C (41°F). Maximum temperatures can reach 25°C (76°F), while minimum temperatures can drop as low as -13°C (9°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack accordingly.

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 5°C (41°F), with highs reaching up to 25°C (76°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec353849566775797672594541
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 precipitation amount is 77 mm (3.0 in) distributed over 8 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 77 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8711015115817787100106681277677
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 86%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite challenging due to the chill combined with the stickiness in the air.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%80%80%83%83%76%69%68%72%83%87%
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 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 Piedmont, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather2°C (35°F)87 mm (3.4 inches)83%moderate
February Weather4°C (39°F)110 mm (4.3 inches)81%high
March Weather9°C (49°F)151 mm (6.0 inches)80%high
April Weather13°C (56°F)158 mm (6.2 inches)80%very high
May Weather19°C (67°F)177 mm (7.0 inches)83%very high
June Weather24°C (76°F)87 mm (3.4 inches)83%extreme
July Weather26°C (80°F)100 mm (3.9 inches)76%extreme
August Weather24°C (76°F)106 mm (4.2 inches)69%very high
September Weather22°C (73°F)68 mm (2.7 inches)68%very high
October Weather15°C (60°F)127 mm (5.0 inches)72%high
November Weather7°C (46°F)76 mm (3.0 inches)83%moderate
December Weather5°C (41°F)77 mm (3.0 inches)86%moderate

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