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December Weather in Jamestown, United States

Last updated: June 24, 2025

In December, the average temperature in Jamestown, United States hovers around 2°C (36°F), with extremes reaching a chilling -24°C (-12°F) to a warm 18°C (64°F). Expect around 72 mm (2.8 in) of precipitation spread over approximately 10 days, and be prepared for high humidity levels averaging 87%.

December Temperature in Jamestown

In December in Jamestown, the average temperature is 2°C (36°F). Maximums can reach 18°C (64°F) and minimums can be as low as -24°C (-12°F). Prepare for a wide range of temperatures and pack accordingly for your trip!

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 2°C (36°F), with highs reaching up to 18°C (64°F) and lows dropping to around -24°C (-12°F).
JanFebMarAprMayJunJulAugSepOctNovDec293242526473767470574135
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 total precipitation amount is 72 mm (2.8 in) spread over a duration of 10 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 72 mm (2.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8185117941471039992671088372
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 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.

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.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Jamestown, you can visit Hourly UV Index in Jamestown.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098642
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 Weather-2°C (29°F)81 mm (3.2 inches)87%moderate
February Weather0°C (32°F)85 mm (3.3 inches)85%moderate
March Weather6°C (42°F)117 mm (4.6 inches)86%high
April Weather11°C (52°F)94 mm (3.7 inches)84%very high
May Weather18°C (64°F)147 mm (5.8 inches)79%very high
June Weather23°C (74°F)103 mm (4.0 inches)82%extreme
July Weather25°C (77°F)99 mm (3.9 inches)79%very high
August Weather23°C (74°F)92 mm (3.6 inches)70%very high
September Weather21°C (70°F)67 mm (2.7 inches)69%very high
October Weather14°C (58°F)108 mm (4.3 inches)76%high
November Weather5°C (42°F)83 mm (3.3 inches)88%moderate
December Weather2°C (36°F)72 mm (2.8 inches)87%low

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