January Weather in Wilton, United States

Last updated: June 24, 2025

In January, the average temperature in Wilton, United States hovers around -3°C (27°F), with minimums plunging to -22°C (-8°F) and maximums reaching a mild 18°C (65°F). Expect about 75 mm (2.9 in) of precipitation spread over 8 days, accompanied by an average humidity of 86%.

January Temperature in Wilton

In January in Wilton, the average temperature is -3°C (27°F). Maximums can reach 18°C (65°F) while minimums can dip as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and dress accordingly to enjoy their visit comfortably.

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 -3°C (27°F), with highs reaching up to 18°C (65°F) and lows dropping to around -22°C (-8°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 75 mm (2.9 in) over a span of 8 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 75 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.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Wilton

In Wilton in January, humidity is 86%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill, making travel uncomfortable as the cold air penetrates through clothing, leaving you feeling damp and uneasy.

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 86%, 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	-3°C (27°F)	75 mm (2.9 inches)	86%	moderate
February Weather	-1°C (30°F)	88 mm (3.5 inches)	84%	moderate
March Weather	2°C (35°F)	83 mm (3.3 inches)	82%	moderate
April Weather	8°C (47°F)	132 mm (5.2 inches)	80%	very high
May Weather	14°C (58°F)	86 mm (3.4 inches)	72%	very high
June Weather	20°C (68°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (73°F)	150 mm (5.9 inches)	67%	very high
August Weather	22°C (72°F)	97 mm (3.8 inches)	66%	very high
September Weather	18°C (65°F)	85 mm (3.3 inches)	71%	high
October Weather	12°C (54°F)	134 mm (5.3 inches)	78%	high
November Weather	4°C (40°F)	103 mm (4.0 inches)	84%	moderate
December Weather	-1°C (31°F)	124 mm (4.9 inches)	81%	low