January Weather in Williamstown, United States

Last updated: June 24, 2025

In January, the average temperature in Williamstown, United States hovers around 1°C (35°F). Expect a wide range of temperatures, with a chilly minimum of -22°C (-8°F) and a cozy maximum of 21°C (69°F). Prepare for some rain, as 82 mm (3.2 in) of precipitation typically falls over 10 days, and with an average humidity of 88%, it’s sure to feel quite damp.

January Temperature in Williamstown

In January in Williamstown, the average temperature is 1°C (35°F). Maximums can reach 21°C (69°F), while minimums can dip as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for 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 1°C (35°F), with highs reaching up to 21°C (69°F) and lows dropping to around -22°C (-8°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 total precipitation amount is 82 mm (3.2 in) observed over a span of 10 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 82 mm (3.2 inches) of precipitation spread over approximately 10 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 88%. With an average temperature of 1°C (35°F), this humidity feels like a chilly embrace, making travel quite uncomfortable as the cold moisture clings to your skin, leaving you feeling damp and frigid.

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 88%, 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	1°C (35°F)	82 mm (3.2 inches)	88%	moderate
February Weather	4°C (39°F)	122 mm (4.8 inches)	88%	moderate
March Weather	8°C (46°F)	133 mm (5.2 inches)	87%	high
April Weather	13°C (55°F)	135 mm (5.3 inches)	85%	very high
May Weather	19°C (66°F)	131 mm (5.2 inches)	81%	very high
June Weather	23°C (73°F)	167 mm (6.6 inches)	82%	very high
July Weather	25°C (77°F)	119 mm (4.7 inches)	81%	very high
August Weather	24°C (75°F)	88 mm (3.5 inches)	73%	very high
September Weather	21°C (71°F)	107 mm (4.2 inches)	73%	very high
October Weather	15°C (60°F)	104 mm (4.1 inches)	78%	high
November Weather	7°C (45°F)	91 mm (3.6 inches)	89%	moderate
December Weather	4°C (40°F)	116 mm (4.6 inches)	87%	moderate