March Weather in Boston, United States

Last updated: June 24, 2025

In March, the average temperature in Boston, United States hovers around 17°C (64°F), offering a pleasant climate for visitors. However, be prepared for a wide range of temperatures, with a minimum of -1°C (30°F) and a maximum of 33°C (92°F). During this month, expect an average precipitation of 52 mm (2.1 in) spread over 5 days, along with an average humidity level of 80%. Whether you’re exploring, relaxing, or adventuring, pack accordingly!

March Temperature in Boston

In March in Boston, the average temperature is 17°C (64°F). The maximum can reach 33°C (92°F) and the minimum can be as low as -1°C (30°F). This variation in temperature makes it essential for travelers to pack accordingly, ensuring they are prepared for both warm days and cooler nights.

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

The chart illustrates March temperature patterns in Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boston, March typically has an average temperature of 17°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around -1°C (30°F).

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

March Precipitation in Boston

In Boston in March, the precipitation amount is 52 mm (2.1 in) over a period of 5 days.

March Precipitation Trends in Boston

The chart displays monthly precipitation patterns in Boston, 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 Boston, March typically receives around 52 mm (2.1 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 Boston

In Boston in March, humidity is 80%. With an average temperature of 17°C (64°F), this humidity feels like a warm blanket wrapping around you, making travel somewhat uncomfortable as the air feels heavy and oppressive.

March Average Humidity in Boston

This chart illustrates the average monthly humidity levels in Boston, 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 Boston is approximately 80%, 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 Boston

In Boston in March, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Boston.

Maximum UV Index Levels in Boston for March

The chart shows the monthly maximum UV Index (UVI) for Boston 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 Boston typically reaches 9, which falls under the very high exposure category.

Data source: Boston 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 Boston Compares to Other Months

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

This table compares monthly weather conditions in Boston, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	72 mm (2.8 inches)	85%	moderate
February Weather	15°C (60°F)	96 mm (3.8 inches)	82%	very high
March Weather	17°C (64°F)	52 mm (2.1 inches)	80%	very high
April Weather	20°C (69°F)	80 mm (3.1 inches)	76%	very high
May Weather	25°C (76°F)	74 mm (2.9 inches)	73%	extreme
June Weather	27°C (80°F)	157 mm (6.2 inches)	74%	extreme
July Weather	27°C (81°F)	148 mm (5.8 inches)	80%	extreme
August Weather	27°C (82°F)	137 mm (5.4 inches)	79%	extreme
September Weather	26°C (80°F)	110 mm (4.3 inches)	83%	very high
October Weather	23°C (74°F)	73 mm (2.9 inches)	77%	very high
November Weather	16°C (61°F)	50 mm (2.0 inches)	84%	high
December Weather	13°C (56°F)	117 mm (4.6 inches)	88%	moderate