January Weather in Westbrook, United States

Last updated: June 24, 2025

In Westbrook, United States, the average temperature for January hovers around -8°C (17°F). However, temperatures can vary significantly, with minimums plunging to -34°C (-29°F) and maximums reaching up to 10°C (50°F). Throughout the month, expect about 29 mm (1.1 in) of precipitation spread over 5 days, while the air remains quite damp, with an average humidity of 80%.

January Temperature in Westbrook

In January in Westbrook, the average temperature is -8°C (17°F), with maximums that can reach up to 10°C (50°F) and minimums that can plummet to as low as -34°C (-29°F). Travelers should be prepared for extreme cold and fluctuations in temperature during this time.

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

The chart illustrates January temperature patterns in Westbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westbrook, January typically has an average temperature of -8°C (17°F), with highs reaching up to 10°C (50°F) and lows dropping to around -34°C (-29°F).

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

January Precipitation in Westbrook

In Westbrook in January, the total precipitation amount is 29 mm (1.1 in) recorded over a span of 5 days.

January Precipitation Trends in Westbrook

The chart displays monthly precipitation patterns in Westbrook, 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 Westbrook, January typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 5 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 Westbrook

In Westbrook in January humidity is 80%. With an average temperature of -8°C (17°F), this humidity feels like a biting chill that clings to your skin, making every breath a sharp reminder of the cold, and can transform even the simplest of outdoor activities into a daunting challenge for travelers.

January Average Humidity in Westbrook

This chart illustrates the average monthly humidity levels in Westbrook, 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 Westbrook is approximately 80%, 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 Westbrook

In Westbrook 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 Westbrook, you can check the information here.

Maximum UV Index Levels in Westbrook for January

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

Data source: Westbrook 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 Westbrook Compares to Other Months

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

This table compares monthly weather conditions in Westbrook, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	29 mm (1.1 inches)	80%	moderate
February Weather	-9°C (17°F)	28 mm (1.1 inches)	84%	moderate
March Weather	0°C (33°F)	66 mm (2.6 inches)	75%	high
April Weather	6°C (43°F)	86 mm (3.4 inches)	79%	very high
May Weather	15°C (59°F)	127 mm (5.0 inches)	74%	very high
June Weather	22°C (72°F)	124 mm (4.9 inches)	81%	very high
July Weather	23°C (74°F)	119 mm (4.7 inches)	82%	very high
August Weather	21°C (70°F)	124 mm (4.9 inches)	80%	very high
September Weather	18°C (64°F)	110 mm (4.3 inches)	75%	very high
October Weather	9°C (48°F)	96 mm (3.8 inches)	77%	moderate
November Weather	1°C (34°F)	31 mm (1.2 inches)	85%	moderate
December Weather	-4°C (25°F)	42 mm (1.6 inches)	83%	low