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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 -2°C (28°F). Temperatures can vary, with a minimum dropping to -23°C (-9°F) and a maximum reaching 19°C (67°F). Expect about 96 mm (3.8 in) of precipitation spread over 14 days, accompanied by high humidity levels averaging 88%.

January Temperature in Jamestown

In January in Jamestown, the average temperature is -2°C (28°F), with maximums reaching up to 19°C (67°F) and minimums plummeting as low as -23°C (-9°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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 -2°C (28°F), with highs reaching up to 19°C (67°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec283138486068737166554034
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 total precipitation amount is 96 mm (3.8 in) over the course of 14 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 96 mm (3.8 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec96102111130140138138102100124105102
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 88%. With an average temperature of -2°C (28°F), this humidity feels like an icy cling to your skin, making every breath feel brisk and sharp, while the dampness cuts through layers of clothing, leaving travelers yearning for warmth and comfort.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec346910101098642
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-2°C (28°F)96 mm (3.8 inches)88%moderate
February Weather-1°C (31°F)102 mm (4.0 inches)88%moderate
March Weather3°C (38°F)111 mm (4.4 inches)87%high
April Weather9°C (48°F)130 mm (5.1 inches)87%very high
May Weather15°C (60°F)140 mm (5.5 inches)81%very high
June Weather20°C (68°F)138 mm (5.4 inches)83%very high
July Weather23°C (73°F)138 mm (5.4 inches)82%very high
August Weather21°C (71°F)102 mm (4.0 inches)76%very high
September Weather19°C (66°F)100 mm (3.9 inches)77%very high
October Weather13°C (55°F)124 mm (4.9 inches)82%high
November Weather4°C (40°F)105 mm (4.1 inches)89%moderate
December Weather1°C (34°F)102 mm (4.0 inches)86%low

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