January Weather in Williamstown, United States

Last updated: June 24, 2025

In January, the average temperature in Williamstown, United States hovers around -5°C (23°F). Expect a chilly range, with minimums plunging as low as -28°C (-17°F) and maximums reaching up to 15°C (60°F). During this month, precipitation totals approximately 86 mm (3.4 in), spread over about 11 days, and an average humidity level of 89% ensures a brisk atmosphere.

January Temperature in Williamstown

In January, in Williamstown, the average temperature is -5°C (23°F). Maximums can reach 15°C (60°F), and minimums can be as low as -28°C (-17°F). Travelers should prepare for a wide temperature range and dress in layers to stay comfortable during their visit.

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

The chart illustrates January temperature patterns in Williamstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamstown, January typically has an average temperature of -5°C (23°F), with highs reaching up to 15°C (60°F) and lows dropping to around -28°C (-17°F).

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

January Precipitation in Williamstown

In Williamstown in January, the precipitation amount is 86 mm (3.4 in), spread over 11 days.

January Precipitation Trends in Williamstown

The chart displays monthly precipitation patterns in Williamstown, 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 Williamstown, January typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 11 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 Williamstown

In Williamstown in January, humidity is 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.

January Average Humidity in Williamstown

This chart illustrates the average monthly humidity levels in Williamstown, 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 Williamstown is approximately 89%, 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 Williamstown

In Williamstown 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 Williamstown, you can check the information here.

Maximum UV Index Levels in Williamstown for January

The chart shows the monthly maximum UV Index (UVI) for Williamstown 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 Williamstown typically reaches 3, which falls under the moderate exposure category.

Data source: Williamstown 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 Williamstown Compares to Other Months

Weather in Williamstown varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Williamstown, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Williamstown, 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 (23°F)	86 mm (3.4 inches)	89%	moderate
February Weather	-3°C (26°F)	105 mm (4.1 inches)	88%	moderate
March Weather	0°C (32°F)	94 mm (3.7 inches)	86%	high
April Weather	7°C (44°F)	136 mm (5.4 inches)	84%	very high
May Weather	13°C (56°F)	110 mm (4.3 inches)	76%	very high
June Weather	18°C (65°F)	90 mm (3.5 inches)	72%	very high
July Weather	21°C (71°F)	130 mm (5.1 inches)	66%	very high
August Weather	20°C (69°F)	103 mm (4.0 inches)	64%	very high
September Weather	17°C (62°F)	105 mm (4.1 inches)	72%	high
October Weather	10°C (51°F)	155 mm (6.1 inches)	81%	high
November Weather	2°C (37°F)	113 mm (4.5 inches)	87%	moderate
December Weather	-2°C (28°F)	115 mm (4.5 inches)	84%	low