January Weather in Jamestown, United States

Last updated: June 24, 2025

In Jamestown, United States, the average temperature in January hovers around 5°C (41°F). This month can bring a wide range of temperatures, with a minimum of -17°C (2°F) and a maximum of 24°C (75°F). Expect 88 mm (3.5 in) of precipitation spread over about 9 days, accompanied by an average humidity level of 86%.

January Temperature in Jamestown

In January in Jamestown, the average temperature is 5°C (41°F). The maximum can reach 24°C (75°F), while the minimum can drop as low as -17°C (2°F). It's advisable to pack layers to prepare for the wide temperature range during your travels.

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 5°C (41°F), with highs reaching up to 24°C (75°F) and lows dropping to around -17°C (2°F).

Data source: Temperature data for Jamestown generated using information from the Copernicus Climate Change Service.

January Precipitation in Jamestown

In Jamestown in January, the precipitation amount is 88 mm (3.5 in) over the course of 9 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 88 mm (3.5 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Jamestown

In Jamestown in January humidity is 86%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite challenging due to the chill combined with the stickiness 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 86%, offering insight into how humid the weather typically is during this month.

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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Jamestown for better planning.

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 4, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	88 mm (3.5 inches)	86%	moderate
February Weather	8°C (47°F)	121 mm (4.8 inches)	85%	high
March Weather	11°C (52°F)	87 mm (3.4 inches)	84%	very high
April Weather	16°C (60°F)	109 mm (4.3 inches)	82%	very high
May Weather	21°C (69°F)	120 mm (4.7 inches)	83%	very high
June Weather	24°C (76°F)	106 mm (4.2 inches)	82%	extreme
July Weather	27°C (80°F)	97 mm (3.8 inches)	80%	very high
August Weather	25°C (78°F)	127 mm (5.0 inches)	74%	very high
September Weather	23°C (73°F)	137 mm (5.4 inches)	75%	very high
October Weather	17°C (64°F)	104 mm (4.1 inches)	79%	very high
November Weather	9°C (49°F)	82 mm (3.2 inches)	87%	moderate
December Weather	7°C (45°F)	109 mm (4.3 inches)	87%	moderate