January Weather in Wilton, United States

Last updated: June 24, 2025

In Wilton, United States, the average temperature in January hovers around -11°C (13°F), with extremes ranging from a chilling -36°C (-33°F) to a mild 6°C (44°F). During this time, expect around 13 mm (0.5 in) of precipitation over approximately 3 days, and enjoy a notable average humidity of 84%.

January Temperature in Wilton

In January in Wilton, the average temperature is -11°C (13°F), with maximums peaking at 6°C (44°F) and minimums plummeting to as low as -36°C (-33°F). Travelers should be prepared for extremely cold conditions and pack appropriate winter gear for comfort and safety.

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 -11°C (13°F), with highs reaching up to 6°C (44°F) and lows dropping to around -36°C (-33°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 13 mm (0.5 in) over a span of 3 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 13 mm (0.5 inches) of precipitation spread over approximately 3 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 84%. With an average temperature of -11°C (13°F), this humidity feels like an icy fog that clings to your skin, making every breath a sharp reminder of the cold and leaving your clothes damp and heavy as you navigate the frigid landscape.

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 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 Wilton

In Wilton in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Wilton, you can visit Hourly UV Index in Wilton.

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 2, which falls under the low 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	-11°C (13°F)	13 mm (0.5 inches)	84%	low
February Weather	-12°C (11°F)	17 mm (0.7 inches)	88%	moderate
March Weather	-2°C (28°F)	26 mm (1.0 inches)	78%	moderate
April Weather	4°C (39°F)	28 mm (1.1 inches)	75%	very high
May Weather	13°C (55°F)	45 mm (1.8 inches)	76%	very high
June Weather	20°C (68°F)	59 mm (2.3 inches)	79%	very high
July Weather	22°C (72°F)	65 mm (2.5 inches)	78%	very high
August Weather	20°C (69°F)	67 mm (2.6 inches)	78%	very high
September Weather	15°C (60°F)	65 mm (2.6 inches)	69%	high
October Weather	6°C (43°F)	50 mm (2.0 inches)	71%	moderate
November Weather	-1°C (30°F)	19 mm (0.8 inches)	82%	moderate
December Weather	-7°C (20°F)	23 mm (0.9 inches)	84%	low