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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 4°C (39°F). However, temperatures can swing dramatically, with a minimum of -16°C (3°F) and a maximum reaching 19°C (66°F). Expect about 116 mm (4.5 in) of precipitation over 11 days, contributing to an average humidity level of 86%. Be prepared for a mix of chilly and damp weather!

December Temperature in Piedmont

In December in Piedmont, the average temperature is 4°C (39°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for a varied experience.

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 4°C (39°F), with highs reaching up to 19°C (66°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec344045536268727166574339
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 116 mm (4.5 in) accumulated over the course of 11 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 116 mm (4.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec97153122130149123811019312477116
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 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.

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.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
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 Weather1°C (34°F)97 mm (3.8 inches)87%moderate
February Weather4°C (40°F)153 mm (6.0 inches)87%high
March Weather7°C (45°F)122 mm (4.8 inches)86%very high
April Weather11°C (53°F)130 mm (5.1 inches)84%very high
May Weather17°C (62°F)149 mm (5.9 inches)83%extreme
June Weather20°C (68°F)123 mm (4.8 inches)83%extreme
July Weather22°C (73°F)81 mm (3.2 inches)79%extreme
August Weather21°C (71°F)101 mm (4.0 inches)66%very high
September Weather19°C (67°F)93 mm (3.7 inches)68%very high
October Weather14°C (57°F)124 mm (4.9 inches)78%high
November Weather6°C (43°F)77 mm (3.0 inches)89%moderate
December Weather4°C (39°F)116 mm (4.5 inches)86%moderate

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