January Weather in Westerly, United States

Last updated: June 24, 2025

In January, the average temperature in Westerly, United States hovers around 0°C (33°F). Expect chilly conditions with minimums dipping to -20°C (-3°F) and maximums reaching up to 19°C (66°F). Precipitation is fairly frequent, averaging 73 mm (2.9 in) over 8 days, contributing to a high average humidity of 84%. Prepare accordingly!

January Temperature in Westerly

In January in Westerly, the average temperature is 0°C (33°F). Maximums can reach 19°C (66°F), and minimums can be as low as -20°C (-3°F). Be prepared for a chilly adventure, but also enjoy the possibility of pleasantly mild days during your travels!

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

The chart illustrates January temperature patterns in Westerly, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westerly, January typically has an average temperature of 0°C (33°F), with highs reaching up to 19°C (66°F) and lows dropping to around -20°C (-3°F).

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

January Precipitation in Westerly

In Westerly in January, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

January Precipitation Trends in Westerly

The chart displays monthly precipitation patterns in Westerly, 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 Westerly, January typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 8 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 Westerly

In Westerly in January humidity is 84%. With average temperature 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less enjoyable and travel plans challenging.

January Average Humidity in Westerly

This chart illustrates the average monthly humidity levels in Westerly, 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 Westerly is approximately 84%, 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 Westerly

In Westerly 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 Westerly, you can check the information here.

Maximum UV Index Levels in Westerly for January

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

Data source: Westerly 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 Westerly Compares to Other Months

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

This table compares monthly weather conditions in Westerly, 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 (33°F)	73 mm (2.9 inches)	84%	moderate
February Weather	2°C (35°F)	95 mm (3.7 inches)	84%	moderate
March Weather	4°C (39°F)	101 mm (4.0 inches)	82%	high
April Weather	9°C (48°F)	125 mm (4.9 inches)	79%	very high
May Weather	14°C (58°F)	111 mm (4.4 inches)	75%	very high
June Weather	20°C (68°F)	95 mm (3.7 inches)	78%	very high
July Weather	23°C (74°F)	128 mm (5.0 inches)	76%	very high
August Weather	23°C (74°F)	102 mm (4.0 inches)	76%	very high
September Weather	19°C (67°F)	93 mm (3.7 inches)	75%	very high
October Weather	14°C (58°F)	134 mm (5.3 inches)	75%	high
November Weather	7°C (46°F)	100 mm (3.9 inches)	80%	moderate
December Weather	3°C (37°F)	125 mm (4.9 inches)	80%	low