January Weather in Wilton, United States

Last updated: June 24, 2025

In January, the average temperature in Wilton, United States hovers around -5°C (24°F), with extremes that can plunge to a chilling -31°C (-24°F) or reach up to a mild 12°C (54°F). Expect 52 mm (2.0 in) of precipitation spread over 7 days, contributing to a high average humidity of 81%. Dress warmly and prepare for a wintry experience!

January Temperature in Wilton

In January in Wilton, the average temperature is -5°C (24°F), with maxima reaching 12°C (54°F) and minima dipping as low as -31°C (-24°F). Travelers should be prepared for cold conditions and pack accordingly for fluctuating temperatures.

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

The chart illustrates January temperature patterns in Wilton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wilton, January typically has an average temperature of -5°C (24°F), with highs reaching up to 12°C (54°F) and lows dropping to around -31°C (-24°F).

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

January Precipitation in Wilton

In Wilton in January, the precipitation amount is 52 mm (2.0 in) over a duration of 7 days.

January Precipitation Trends in Wilton

The chart displays monthly precipitation patterns in Wilton, 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 Wilton, January typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 7 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 Wilton

In Wilton in January humidity is 81%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket enveloping you, making breath visible in the air and every step crunch underfoot. The cold moisture adds a biting chill, turning even short excursions into a race to find warmth, while creating a mesmerizing frost on the landscape that can be both beautiful and unforgiving for travelers.

January Average Humidity in Wilton

This chart illustrates the average monthly humidity levels in Wilton, 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 Wilton is approximately 81%, 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 Wilton

In Wilton 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 Wilton, you can check the information here.

Maximum UV Index Levels in Wilton for January

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

Data source: Wilton 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 Wilton Compares to Other Months

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

This table compares monthly weather conditions in Wilton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	52 mm (2.0 inches)	81%	moderate
February Weather	-3°C (26°F)	59 mm (2.3 inches)	81%	moderate
March Weather	4°C (40°F)	88 mm (3.4 inches)	81%	high
April Weather	10°C (50°F)	91 mm (3.6 inches)	82%	very high
May Weather	17°C (63°F)	144 mm (5.7 inches)	78%	very high
June Weather	23°C (74°F)	132 mm (5.2 inches)	81%	extreme
July Weather	25°C (77°F)	72 mm (2.8 inches)	79%	very high
August Weather	23°C (74°F)	73 mm (2.9 inches)	77%	very high
September Weather	20°C (69°F)	112 mm (4.4 inches)	78%	very high
October Weather	12°C (54°F)	122 mm (4.8 inches)	78%	high
November Weather	4°C (39°F)	50 mm (2.0 inches)	87%	moderate
December Weather	0°C (32°F)	47 mm (1.8 inches)	84%	moderate