January Weather in Westfield, United States

Last updated: June 24, 2025

In January, the average temperature in Westfield, United States hovers around -2°C (28°F). While temperatures can drop as low as -23°C (-10°F), they can also rise to a maximum of 18°C (65°F). Expect around 79 mm (3.1 in) of precipitation over 8 days this month, accompanied by a high average humidity of 89%.

January Temperature in Westfield

In January in Westfield, the average temperature is -2°C (28°F), with maximums reaching 18°C (65°F) and minimums dipping as low as -23°C (-10°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to ensure comfort during their stay.

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

The chart illustrates January temperature patterns in Westfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westfield, January typically has an average temperature of -2°C (28°F), with highs reaching up to 18°C (65°F) and lows dropping to around -23°C (-10°F).

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

January Precipitation in Westfield

In Westfield in January, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

January Precipitation Trends in Westfield

The chart displays monthly precipitation patterns in Westfield, 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 Westfield, January typically receives around 79 mm (3.1 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 Westfield

In Westfield in January, humidity is 89%. With an average temperature of -2°C (28°F), this humidity feels like a heavy blanket, making it difficult to stay warm while traveling outdoors.

January Average Humidity in Westfield

This chart illustrates the average monthly humidity levels in Westfield, 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 Westfield 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 Westfield

In Westfield 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 Westfield, you can check the information here.

Maximum UV Index Levels in Westfield for January

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

Data source: Westfield 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 Westfield Compares to Other Months

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

This table compares monthly weather conditions in Westfield, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	79 mm (3.1 inches)	89%	moderate
February Weather	-1°C (31°F)	97 mm (3.8 inches)	88%	moderate
March Weather	2°C (36°F)	85 mm (3.4 inches)	86%	high
April Weather	8°C (48°F)	144 mm (5.7 inches)	84%	very high
May Weather	15°C (59°F)	109 mm (4.3 inches)	76%	very high
June Weather	20°C (68°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (73°F)	158 mm (6.2 inches)	66%	very high
August Weather	22°C (72°F)	106 mm (4.2 inches)	64%	very high
September Weather	18°C (65°F)	112 mm (4.4 inches)	72%	very high
October Weather	12°C (54°F)	156 mm (6.2 inches)	81%	high
November Weather	5°C (41°F)	97 mm (3.8 inches)	87%	moderate
December Weather	0°C (32°F)	123 mm (4.8 inches)	84%	low