March weather forecast and climate
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
March is the rainiest month of the year in Boston. There are approximately eleven and a half rainfall days, and the rain gauge collects the highest 4.3" (109.2mm) in precipitation.
The weather is winter-like with a low temperature in the range of 31.1°F (-0.5°C) and 45.3°F (7.4°C). The first half of March is cold and wintery, but the second half becomes mildly cool as spring arrives.
Snowfall is experienced for approximately four days, accumulating to 7.8" (198.1mm) on the ground. Mild snowstorms and extreme cold waves are occasionally experienced during this period, making the nights feel very cold. With approximately seven hours of sunshine per day, the daytimes are a lot warmer, and basking is common.

What is the temperature in March in Boston?

In March, the average high-temperature is 45.3°F (7.4°C), and the average low-temperature is 31.1°F (-0.5°C).

How many days does it rain in March in Boston?

In Boston, Massachusetts, during March, the rain falls for 11.6 days and regularly aggregates up to 4.3" (109.7mm) of precipitation.

What is the wettest month in Boston?

The month with the most rainfall in Boston is March when the rain falls for 11.6 days and typically aggregates up to 4.3" (109.7mm) of precipitation.

How much does it snow in Boston in March?

In Boston, in March, snow falls for 4.2 days, with typically accumulated 7.8" (198.1mm) of snow.

How cold is the water in March in Boston?

In Boston, Massachusetts, in March, the average water temperature is 38.3°F (3.5°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.
Average temperature in March - Boston, MA
  • Average high temperature in March: 45.4°F

The warmest month (with the highest average high temperature) is July (81.4°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in March: 31.1°F

The month with the highest average low temperature is July (65.4°F).
The coldest month (with the lowest average low temperature) is January (22.2°F).

Average humidity in March - Boston, MA
  • Average humidity in March: 63.1%

The month with the highest relative humidity is September (71.8%).
The month with the lowest relative humidity is February (62%).

Average rainfall in March - Boston, MA
  • Average rainfall in March: 4.3"

The wettest month (with the highest rainfall) is March (4.3").
The driest month (with the lowest rainfall) is February (3.3").

Average rainfall days in March - Boston, MA
  • Average rainfall days in March: 11.6 days

The month with the highest number of rainy days is May (12 days).
The month with the lowest number of rainy days is September (8.6 days).

Average snowfall in March - Boston, MA
  • Average snowfall in March: 7.8"

The month with the highest snowfall is January (12.9").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in March - Boston, MA
  • Average snowfall days in March: 4.2 days

The month with the highest number of snowfall days is January (6.7 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in March - Boston, MA
  • Average sea temperature in March: 38.4°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

Average daylight in March / Average sunshine in March - Boston, MA
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in March: 6.9h

The month with most sunshine is July (Average sunshine: 9.7h).
The month with least sunshine is December (Average sunshine: 4.6h).

Average UV index in March - Boston, MA
  • Average UV index in March: 4

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 1).

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