January Weather in Williamstown, United States

Last updated: June 24, 2025

In January, the average temperature in Williamstown, United States hovers around 0°C (32°F). The temperatures can vary widely, dipping to a brisk -18°C (-1°F) at night and soaring to a mild 18°C (65°F) during the day. Expect 74 mm (2.9 in) of precipitation spread over 9 days, contributing to an average humidity level of a muggy 87%. Stay prepared for a blend of chilly and warm moments!

January Temperature in Williamstown

In January in Williamstown, the average temperature is 0°C (32°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -18°C (-1°F). Travelers should be prepared for a wide range of temperatures and dress in layers to enjoy their visit comfortably.

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 0°C (32°F), with highs reaching up to 18°C (65°F) and lows dropping to around -18°C (-1°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 74 mm (2.9 in), which occurs over a span of 9 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 74 mm (2.9 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 Williamstown

In Williamstown in January, humidity is 87%. With an average temperature of 0°C (32°F), this humidity feels like a damp chill that clings to your skin, making travel uncomfortable and cold, as each breath brings a heavy moisture that seeps into your clothes.

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 87%, 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	0°C (32°F)	74 mm (2.9 inches)	87%	moderate
February Weather	1°C (35°F)	107 mm (4.2 inches)	85%	moderate
March Weather	5°C (41°F)	98 mm (3.8 inches)	85%	high
April Weather	11°C (52°F)	110 mm (4.4 inches)	83%	very high
May Weather	17°C (62°F)	127 mm (5.0 inches)	75%	very high
June Weather	21°C (71°F)	106 mm (4.2 inches)	73%	very high
July Weather	25°C (76°F)	152 mm (6.0 inches)	65%	very high
August Weather	23°C (74°F)	140 mm (5.5 inches)	62%	very high
September Weather	20°C (68°F)	115 mm (4.5 inches)	66%	very high
October Weather	14°C (58°F)	114 mm (4.5 inches)	79%	high
November Weather	6°C (43°F)	98 mm (3.9 inches)	87%	moderate
December Weather	2°C (36°F)	94 mm (3.7 inches)	85%	low