January Weather in Wilton, United States

Last updated: June 24, 2025

In Wilton, United States, the average temperature in January hovers around 9°C (48°F), presenting a diverse climate. Expect temperature fluctuations with a minimum of -11°C (13°F) and a maximum soaring to 27°C (81°F). During this month, 107 mm (4.2 in) of precipitation may fall over approximately 9 days, contributing to an average humidity of 85%. Be prepared for a mix of chilly days and the occasional warm spell!

January Temperature in Wilton

In January in Wilton, the average temperature is 9°C (48°F). The maximum can reach 27°C (81°F) and the minimum can be as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 9°C (48°F), with highs reaching up to 27°C (81°F) and lows dropping to around -11°C (13°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 107 mm (4.2 in), occurring over a span of 9 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 107 mm (4.2 inches) of precipitation spread over approximately 9 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 85%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while traveling.

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 85%, 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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Wilton for better planning.

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 4, 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	9°C (48°F)	107 mm (4.2 inches)	85%	moderate
February Weather	12°C (54°F)	157 mm (6.2 inches)	84%	high
March Weather	15°C (60°F)	133 mm (5.2 inches)	82%	very high
April Weather	18°C (64°F)	144 mm (5.7 inches)	82%	very high
May Weather	23°C (73°F)	109 mm (4.3 inches)	81%	extreme
June Weather	26°C (78°F)	155 mm (6.1 inches)	77%	extreme
July Weather	27°C (81°F)	111 mm (4.4 inches)	77%	extreme
August Weather	27°C (81°F)	127 mm (5.0 inches)	72%	extreme
September Weather	25°C (78°F)	81 mm (3.2 inches)	73%	very high
October Weather	20°C (69°F)	129 mm (5.1 inches)	73%	very high
November Weather	12°C (54°F)	85 mm (3.4 inches)	85%	high
December Weather	10°C (51°F)	140 mm (5.5 inches)	88%	moderate