March Weather in Groton, United States

Last updated: June 24, 2025

In March, the average temperature in Groton, United States hovers around -1°C (31°F). While it can dip as low as -28°C (-18°F), temperatures may occasionally rise to a maximum of 25°C (78°F). Expect 35 mm (1.4 in) of precipitation spread over about 5 days, with an average humidity level of 76%, creating a brisk yet often damp atmosphere.

March Temperature in Groton

In March in Groton, the average temperature is -1°C (31°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -28°C (-18°F). Be prepared for a wide range of temperatures when traveling to Groton during this month.

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

The chart illustrates March temperature patterns in Groton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Groton, March typically has an average temperature of -1°C (31°F), with highs reaching up to 25°C (78°F) and lows dropping to around -28°C (-18°F).

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

March Precipitation in Groton

In Groton in March, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.

March Precipitation Trends in Groton

The chart displays monthly precipitation patterns in Groton, 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 Groton, March typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 5 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Groton

In Groton in March, humidity is 76%. With an average temperature of -1°C (31°F), this humidity feels like a frigid chill clinging to your skin, making travel quite uncomfortable as the cold air intensifies the dampness, leaving you feeling even colder than the actual temperature.

March Average Humidity in Groton

This chart illustrates the average monthly humidity levels in Groton, 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 Groton is approximately 76%, 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 Groton

In Groton in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Groton.

Maximum UV Index Levels in Groton for March

The chart shows the monthly maximum UV Index (UVI) for Groton 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 Groton typically reaches 5, which falls under the moderate exposure category.

Data source: Groton 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 Groton Compares to Other Months

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

This table compares monthly weather conditions in Groton, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (15°F)	18 mm (0.7 inches)	81%	moderate
February Weather	-10°C (14°F)	16 mm (0.6 inches)	85%	moderate
March Weather	-1°C (31°F)	35 mm (1.4 inches)	76%	moderate
April Weather	5°C (41°F)	47 mm (1.9 inches)	79%	high
May Weather	14°C (57°F)	64 mm (2.5 inches)	76%	very high
June Weather	22°C (71°F)	65 mm (2.6 inches)	81%	very high
July Weather	24°C (75°F)	76 mm (3.0 inches)	82%	very high
August Weather	21°C (71°F)	108 mm (4.2 inches)	82%	very high
September Weather	17°C (63°F)	88 mm (3.5 inches)	77%	high
October Weather	8°C (46°F)	76 mm (3.0 inches)	76%	moderate
November Weather	0°C (33°F)	17 mm (0.7 inches)	84%	moderate
December Weather	-5°C (23°F)	33 mm (1.3 inches)	81%	low