January Weather in Stonington, United States

Last updated: June 24, 2025

In January, the average temperature in Stonington, United States hovers around 2°C (35°F). Expect chilly days, with temperatures ranging from a minimum of -16°C (4°F) to a maximum of 14°C (58°F). This month brings about 83 mm (3.3 in) of precipitation spread over approximately 8 days, alongside an average humidity level of 84%. Prepare for a wet and cool experience!

January Temperature in Stonington

In January in Stonington, the average temperature is 2°C (35°F), with maximums reaching 14°C (58°F) and minimums dropping as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm and mild-weather clothing.

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 (35°F), with highs reaching up to 14°C (58°F) and lows dropping to around -16°C (4°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 reaches 83 mm (3.3 in) over the course of 8 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 83 mm (3.3 inches) of precipitation spread over approximately 8 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 84%. With an average temperature of 2°C (35°F), this humidity feels like an uncomfortable chill that penetrates your bones, making outdoor travel quite brisk and uninviting.

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 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 Stonington

In Stonington 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 Stonington, you can check the information here.

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 3, which falls under the moderate 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 (35°F)	83 mm (3.3 inches)	84%	moderate
February Weather	2°C (36°F)	109 mm (4.3 inches)	84%	moderate
March Weather	4°C (39°F)	108 mm (4.3 inches)	82%	high
April Weather	8°C (47°F)	136 mm (5.3 inches)	79%	very high
May Weather	13°C (55°F)	119 mm (4.7 inches)	75%	very high
June Weather	18°C (64°F)	84 mm (3.3 inches)	78%	very high
July Weather	22°C (72°F)	115 mm (4.5 inches)	76%	very high
August Weather	22°C (73°F)	101 mm (4.0 inches)	76%	very high
September Weather	20°C (68°F)	101 mm (4.0 inches)	75%	very high
October Weather	16°C (60°F)	157 mm (6.2 inches)	75%	high
November Weather	9°C (49°F)	113 mm (4.4 inches)	80%	moderate
December Weather	4°C (40°F)	141 mm (5.6 inches)	80%	low