March Weather in Stonington, United States

Last updated: June 24, 2025

In March, the average temperature in Stonington, United States hovers around 4°C (39°F). Temperatures can dip to a chilly -9°C (16°F), while the mercury can rise to a pleasant 15°C (60°F). Expect about 108 mm (4.3 in) of precipitation over 9 days, and prepare for a high average humidity of 82%.

March Temperature in Stonington

In March in Stonington, the average temperature is 4°C (39°F). Maximums can reach 15°C (60°F) and minimums can be as low as -9°C (16°F). Be prepared for a range of temperatures when planning your travel to Stonington during this month.

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

The chart illustrates March 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, March typically has an average temperature of 4°C (39°F), with highs reaching up to 15°C (60°F) and lows dropping to around -9°C (16°F).

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

March Precipitation in Stonington

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

March Precipitation Trends in Stonington

The chart displays monthly precipitation patterns in Stonington, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Stonington, March typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Stonington

In Stonington in March, humidity is 82%. With an average temperature of 4°C (39°F), this humidity feels like a chill that seeps into your bones, making it uncomfortable for traveling as you find yourself bundled up, yet still damp and cold.

March Average Humidity in Stonington

This chart illustrates the average monthly humidity levels in Stonington, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Stonington is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Stonington

In Stonington in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Stonington, you can refer to this Hourly UV Index in Stonington.

Maximum UV Index Levels in Stonington for March

The chart shows the monthly maximum UV Index (UVI) for Stonington in March, 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 March, the maximum UV index in Stonington typically reaches 6, which falls under the high exposure category.

Data source: Stonington March 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 March 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 March’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 March’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