March Weather in Greenwich, United States

Last updated: June 24, 2025

In March, the average temperature in Greenwich, United States hovers around 2°C (35°F). Expect a range where the minimum can plunge to -17°C (1°F), while the maximum may reach a comfortable 22°C (73°F). With a precipitation total of 79 mm (3.1 in) spread over 9 days, and an average humidity of 86%, be prepared for a chilly and damp month ahead!

March Temperature in Greenwich

In March in Greenwich, the average temperature is 2°C (35°F). The maximum can reach 22°C (73°F), while the minimum can drop as low as -17°C (1°F). Travelers should be prepared for a wide range of temperatures, making layering essential for outdoor activities.

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

The chart illustrates March temperature patterns in Greenwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenwich, March typically has an average temperature of 2°C (35°F), with highs reaching up to 22°C (73°F) and lows dropping to around -17°C (1°F).

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

March Precipitation in Greenwich

In Greenwich in March, the precipitation amount is 79 mm (3.1 in) spread over 9 days.

March Precipitation Trends in Greenwich

The chart displays monthly precipitation patterns in Greenwich, 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 Greenwich, March typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 9 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 Greenwich

In Greenwich in March humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

March Average Humidity in Greenwich

This chart illustrates the average monthly humidity levels in Greenwich, 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 Greenwich is approximately 86%, 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 Greenwich

In Greenwich 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 Greenwich, you can refer to this Hourly UV Index in Greenwich.

Maximum UV Index Levels in Greenwich for March

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

Data source: Greenwich 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 Greenwich Compares to Other Months

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

This table compares monthly weather conditions in Greenwich, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	77 mm (3.0 inches)	89%	moderate
February Weather	-2°C (29°F)	95 mm (3.8 inches)	88%	moderate
March Weather	2°C (35°F)	79 mm (3.1 inches)	86%	high
April Weather	8°C (47°F)	121 mm (4.8 inches)	84%	very high
May Weather	15°C (59°F)	89 mm (3.5 inches)	76%	very high
June Weather	20°C (68°F)	82 mm (3.2 inches)	72%	very high
July Weather	23°C (73°F)	108 mm (4.3 inches)	66%	very high
August Weather	22°C (72°F)	80 mm (3.2 inches)	64%	very high
September Weather	18°C (64°F)	87 mm (3.4 inches)	72%	high
October Weather	12°C (53°F)	142 mm (5.6 inches)	81%	moderate
November Weather	4°C (39°F)	106 mm (4.2 inches)	87%	moderate
December Weather	-1°C (31°F)	99 mm (3.9 inches)	84%	low