January Weather in Stonington, United States

Last updated: June 24, 2025

In January, the average temperature in Stonington, United States hovers around -2°C (29°F). Expect minimum chills of -17°C (2°F) and maximum warmth reaching up to 10°C (50°F). Precipitation is moderate, with about 108 mm (4.3 in) spread over 9 days. Coupled with an average humidity level of 88%, this month brings a crisp, damp atmosphere to the region.

January Temperature in Stonington

In January in Stonington, the average temperature is -2°C (29°F). The maximum can reach 10°C (50°F), while the minimum can plunge as low as -17°C (2°F). Travelers should be prepared for cold conditions and pack accordingly for their visit.

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

The chart illustrates January temperature patterns in Stonington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stonington, January typically has an average temperature of -2°C (29°F), with highs reaching up to 10°C (50°F) and lows dropping to around -17°C (2°F).

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

January Precipitation in Stonington

In Stonington in January, the precipitation amount is 108 mm (4.3 in) spread over 9 days.

January Precipitation Trends in Stonington

The chart displays monthly precipitation patterns in Stonington, 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 Stonington, January typically receives around 108 mm (4.3 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 Stonington

In Stonington in January, humidity is 88%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill in the air that penetrates layers of clothing, making outdoor activities challenging and potentially uncomfortable for travelers.

January Average Humidity in Stonington

This chart illustrates the average monthly humidity levels in Stonington, 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 Stonington is approximately 88%, 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 Stonington

In Stonington 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 Stonington, you can visit Hourly UV Index in Stonington.

Maximum UV Index Levels in Stonington for January

The chart shows the monthly maximum UV Index (UVI) for Stonington 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 Stonington typically reaches 2, which falls under the low exposure category.

Data source: Stonington 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 Stonington Compares to Other Months

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

This table compares monthly weather conditions in Stonington, 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 (29°F)	108 mm (4.3 inches)	88%	low
February Weather	-1°C (30°F)	105 mm (4.1 inches)	88%	moderate
March Weather	0°C (33°F)	84 mm (3.3 inches)	85%	moderate
April Weather	5°C (41°F)	157 mm (6.2 inches)	81%	high
May Weather	9°C (49°F)	105 mm (4.1 inches)	76%	very high
June Weather	13°C (56°F)	87 mm (3.4 inches)	74%	very high
July Weather	16°C (62°F)	92 mm (3.6 inches)	74%	very high
August Weather	18°C (64°F)	86 mm (3.4 inches)	74%	very high
September Weather	16°C (60°F)	102 mm (4.0 inches)	77%	high
October Weather	12°C (54°F)	145 mm (5.7 inches)	82%	moderate
November Weather	6°C (43°F)	138 mm (5.4 inches)	85%	moderate
December Weather	1°C (34°F)	155 mm (6.1 inches)	84%	low