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January Weather in Jamestown, United States

Last updated: June 24, 2025

In January the average temperature in Jamestown, United States hovers around -11°C (12°F). However, be prepared for extreme fluctuations, as temperatures can dip to a chilling -36°C (-33°F) and occasionally peak at a mild 5°C (42°F). Expect about 17 mm (0.7 in) of precipitation spread over 4 days, and with an average humidity of 87%, it's a month where your winter gear will truly be put to the test!

January Temperature in Jamestown

In January in Jamestown, the average temperature is -11°C (12°F). The maximum can reach 5°C (42°F) and the minimum can be as low as -36°C (-33°F). Travelers should be well-prepared for frigid conditions and dress in layers to stay warm.

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

The chart illustrates January 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, January typically has an average temperature of -11°C (12°F), with highs reaching up to 5°C (42°F) and lows dropping to around -36°C (-33°F).
JanFebMarAprMayJunJulAugSepOctNovDec12927385568716859432919
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.

January Precipitation in Jamestown

In Jamestown in January, the precipitation amount is 17 mm (0.7 in) over a span of 4 days.

January Precipitation Trends in Jamestown

The chart displays monthly precipitation patterns in Jamestown, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Jamestown, January typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec1719253856838710471741935
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Jamestown

In Jamestown in January, humidity is 87%. With an average temperature of -11°C (12°F), this humidity feels like a biting chill that cuts through layers of clothing, making travel feel uncomfortable and numbing, as the cold moisture hangs heavily in the air.

January Average Humidity in Jamestown

This chart illustrates the average monthly humidity levels in Jamestown, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Jamestown is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%89%82%79%74%78%76%77%72%74%85%85%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Jamestown

In Jamestown in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Jamestown in January, 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 January, the maximum UV index in Jamestown typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
Data source: Jamestown January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (12°F)17 mm (0.7 inches)87%low
February Weather-13°C (10°F)19 mm (0.8 inches)89%moderate
March Weather-3°C (27°F)25 mm (1.0 inches)82%moderate
April Weather4°C (39°F)38 mm (1.5 inches)79%very high
May Weather13°C (55°F)56 mm (2.2 inches)74%very high
June Weather20°C (68°F)83 mm (3.2 inches)78%very high
July Weather22°C (72°F)87 mm (3.4 inches)76%very high
August Weather20°C (68°F)104 mm (4.1 inches)77%very high
September Weather15°C (60°F)71 mm (2.8 inches)72%high
October Weather6°C (43°F)74 mm (2.9 inches)74%moderate
November Weather-2°C (29°F)19 mm (0.7 inches)85%moderate
December Weather-7°C (19°F)35 mm (1.4 inches)84%low

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