nomadseason

December Weather in Jamestown, United States

Last updated: June 24, 2025

In Jamestown, United States, the average temperature in December is a cool 7°C (45°F). During this time, temperatures can dip as low as -8°C (18°F) and soar to a maximum of 23°C (73°F). Expect 109 mm (4.3 in) of precipitation spread over 9 days, contributing to an average humidity of a high 87%. Stay prepared for a mix of conditions!

December Temperature in Jamestown

In December in Jamestown, the average temperature is 7°C (45°F). Maximum temperatures can reach 23°C (73°F), while minimums can drop as low as -8°C (18°F). Be prepared for a wide range of temperatures, making layering essential for comfortable travel.

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 7°C (45°F), with highs reaching up to 23°C (73°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec414651606975807773634945
Data source: Temperature data for Jamestown generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Jamestown

In Jamestown in December, the total precipitation amount is 109 mm (4.3 in) spread over 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 109 mm (4.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec88121871091201069712713710482109
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Jamestown

In Jamestown in December, humidity is 87%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures somewhat uncomfortable and urging travelers to seek refuge in cozy cafes or warm indoor activities.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810101110109853
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 Weather5°C (41°F)88 mm (3.5 inches)86%moderate
February Weather8°C (47°F)121 mm (4.8 inches)85%high
March Weather11°C (52°F)87 mm (3.4 inches)84%very high
April Weather16°C (60°F)109 mm (4.3 inches)82%very high
May Weather21°C (69°F)120 mm (4.7 inches)83%very high
June Weather24°C (76°F)106 mm (4.2 inches)82%extreme
July Weather27°C (80°F)97 mm (3.8 inches)80%very high
August Weather25°C (78°F)127 mm (5.0 inches)74%very high
September Weather23°C (73°F)137 mm (5.4 inches)75%very high
October Weather17°C (64°F)104 mm (4.1 inches)79%very high
November Weather9°C (49°F)82 mm (3.2 inches)87%moderate
December Weather7°C (45°F)109 mm (4.3 inches)87%moderate

Compare Jamestown's Climate with Cities Worldwide