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January Weather in Jamestown, United States

Last updated: June 24, 2025

In January, the average temperature in Jamestown, United States is a chilly -4°C (25°F), with temperatures dipping as low as -23°C (-9°F) and peaking at 17°C (63°F). Expect around 100 mm (3.9 in) of precipitation spread over 15 days, contributing to an average humidity of 89%. Be prepared for a mix of cold and wet weather!

January Temperature in Jamestown

In January in Jamestown, the average temperature is -4°C (25°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures and pack appropriately for both the cold and milder days.

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 -4°C (25°F), with highs reaching up to 17°C (63°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834455765706862523731
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 100 mm (3.9 in) over a span of 15 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 100 mm (3.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec10011210112713914013510690131116110
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 89%. With an average temperature of -4°C (25°F), this humidity feels like an intense chill that seeps into your bones, making traveling uncomfortable as you navigate through the damp, cold 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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
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 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 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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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-4°C (25°F)100 mm (3.9 inches)89%moderate
February Weather-2°C (28°F)112 mm (4.4 inches)90%moderate
March Weather1°C (35°F)101 mm (4.0 inches)89%high
April Weather7°C (45°F)127 mm (5.0 inches)88%very high
May Weather14°C (57°F)139 mm (5.5 inches)80%very high
June Weather18°C (66°F)140 mm (5.5 inches)79%very high
July Weather21°C (70°F)135 mm (5.3 inches)74%very high
August Weather20°C (68°F)106 mm (4.2 inches)64%very high
September Weather17°C (63°F)90 mm (3.5 inches)67%very high
October Weather11°C (52°F)131 mm (5.2 inches)81%high
November Weather3°C (38°F)116 mm (4.6 inches)89%moderate
December Weather-1°C (31°F)110 mm (4.3 inches)88%low

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