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December Weather in Jamestown, United States

Last updated: June 24, 2025

In December, the average temperature in Jamestown, United States is a cool 8°C (46°F). Temperatures can swing from a brisk -2°C (28°F) to a pleasant 22°C (72°F). With an average precipitation of 148 mm (5.8 in) spread over 9 days, and a humidity level around 80%, you might want to pack a light jacket and be prepared for a bit of rain!

December Temperature in Jamestown

In December in Jamestown, the average temperature is 8°C (46°F). Maximum temperatures can reach 22°C (72°F), while minimums can drop as low as -2°C (28°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates December temperature patterns in Jamestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jamestown, December typically has an average temperature of 8°C (46°F), with highs reaching up to 22°C (72°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec464751576372787772625246
Data source: Temperature data for Jamestown 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 Jamestown

In Jamestown in December, the precipitation amount reaches 148 mm (5.8 in) over the course of 9 days.

December Precipitation Trends in Jamestown

The chart displays monthly precipitation patterns in Jamestown, 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 Jamestown, December typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec183180197834940144489148
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Jamestown

In Jamestown in December, humidity is 80%. With an average temperature of 8°C (46°F), this humidity feels like traveling through a damp and chilly mist, making even a short walk feel heavy and uncomfortable.

December Average Humidity in Jamestown

This chart illustrates the average monthly humidity levels in Jamestown, 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 Jamestown is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jamestown

In Jamestown 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 Jamestown, you can check the information here.

Maximum UV Index Levels in Jamestown for December

The chart shows the monthly maximum UV Index (UVI) for Jamestown 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 Jamestown typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589111111109743
Data source: Jamestown 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 Jamestown Compares to Other Months

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

This table compares monthly weather conditions in Jamestown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)183 mm (7.2 inches)82%moderate
February Weather8°C (47°F)180 mm (7.1 inches)84%moderate
March Weather10°C (51°F)197 mm (7.7 inches)82%very high
April Weather14°C (57°F)83 mm (3.3 inches)78%very high
May Weather17°C (63°F)49 mm (1.9 inches)71%extreme
June Weather22°C (73°F)4 mm (0.1 inches)64%extreme
July Weather26°C (79°F)0 mm (0.0 inches)58%extreme
August Weather25°C (78°F)0 mm (0.0 inches)54%very high
September Weather22°C (72°F)4 mm (0.2 inches)55%very high
October Weather16°C (62°F)44 mm (1.7 inches)62%high
November Weather11°C (52°F)89 mm (3.5 inches)78%moderate
December Weather8°C (46°F)148 mm (5.8 inches)80%moderate

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