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December Weather in Williamsburg, United States

Last updated: June 24, 2025

In Williamsburg, United States, the average temperature in December hovers around -2°C (28°F). Expect chilly days, with minimums reaching -20°C (-4°F) and occasional highs of 19°C (66°F). Precipitation amounts to 13 mm (0.5 in) over about 4 days, contributing to the region's average humidity of 89%. Stay warm and prepared!

December Temperature in Williamsburg

In December in Williamsburg, the average temperature is -2°C (28°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -20°C (-4°F). Travelers should be prepared for a wide range of temperatures, from chilly days to surprisingly warm spells.

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

The chart illustrates December temperature patterns in Williamsburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamsburg, December typically has an average temperature of -2°C (28°F), with highs reaching up to 19°C (66°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec242435435264686661453528
Data source: Temperature data for Williamsburg 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 Williamsburg

In Williamsburg in December, the precipitation amount is 13 mm (0.5 in) over a span of 4 days.

December Precipitation Trends in Williamsburg

The chart displays monthly precipitation patterns in Williamsburg, 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 Williamsburg, December typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec172337427444796139281813
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Williamsburg

In Williamsburg in December, humidity is 89%. With an average temperature of -2°C (28°F), this humidity feels like a heavy blanket, making it difficult to stay warm while traveling outdoors.

December Average Humidity in Williamsburg

This chart illustrates the average monthly humidity levels in Williamsburg, 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 Williamsburg is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%76%67%58%52%56%65%76%82%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Williamsburg

In Williamsburg 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 Williamsburg for better planning.

Maximum UV Index Levels in Williamsburg for December

The chart shows the monthly maximum UV Index (UVI) for Williamsburg 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 Williamsburg typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121210754
Data source: Williamsburg 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 Williamsburg Compares to Other Months

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

This table compares monthly weather conditions in Williamsburg, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)17 mm (0.7 inches)88%moderate
February Weather-4°C (25°F)23 mm (0.9 inches)87%high
March Weather2°C (35°F)37 mm (1.5 inches)81%very high
April Weather6°C (43°F)42 mm (1.7 inches)76%extreme
May Weather11°C (52°F)74 mm (2.9 inches)66%extreme
June Weather18°C (64°F)44 mm (1.7 inches)58%extreme
July Weather20°C (68°F)79 mm (3.1 inches)52%extreme
August Weather19°C (66°F)61 mm (2.4 inches)56%extreme
September Weather16°C (61°F)39 mm (1.5 inches)65%very high
October Weather7°C (46°F)28 mm (1.1 inches)76%high
November Weather2°C (36°F)17 mm (0.7 inches)82%moderate
December Weather-2°C (28°F)13 mm (0.5 inches)89%moderate

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