March weather forecast and climate
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts
A beautiful natural park with the George Washington Monument in Boston, Massachusetts
The first month of the spring, March, is a chilly month in Boston, Massachusetts, with temperature in the range of an average low of 30.9°F (-0.6°C) and an average high of 43.5°F (6.4°C).

Temperature

In Boston, the average high-temperature in March marginally rises, from a cold 36.5°F (2.5°C) in February, to a chilly 43.5°F (6.4°C). The average low-temperature, in Boston, is 30.9°F (-0.6°C).

Humidity

The average relative humidity in Boston is 73%.

Rainfall

Months with the most rainfall are March, April and December, with an average 2.91" (74mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Boston, during March, snow falls for 6.8 days and regularly aggregates up to 3.86" (98mm) of snow. Throughout the year, there are 29.8 snowfall days, and 15.75" (400mm) of snow is accumulated.

Ocean temperature

In Boston, the average seawater temperature is 38.3°F (3.5°C).
Note: For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

Daylight

In Boston, the average length of the day is 12h.

Sunshine

The average sunshine in March is 5.6h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Boston. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 2 transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in March in Boston?

The average high-temperature, in March, is 43.5°F (6.4°C), while the average low-temperature is 30.9°F (-0.6°C).

What is the average humidity in March in Boston?

In March, the average relative humidity in Boston, Massachusetts, is 73%.

How much does it rain in Boston in March?

In Boston, during March, the rain falls for 11.6 days and regularly aggregates up to 2.91" (74mm) of precipitation.

What is the rainiest month in Boston?

The wettest months are March, April and December, with an average 2.91" (74mm) of rainfall.

How many days does it snow in March in Boston?

In March, in Boston, Massachusetts, it is snowing for 6.8 days. Throughout March, 3.86" (98mm) of snow is accumulated.

What is the ocean temperature in March in Boston?

In Boston, 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.

How many hours of daylight does Boston have in March?

The average length of the day in March in Boston, Massachusetts, is 12h.

How long on average sun shines in March in Boston?

The average sunshine in March in Boston, Massachusetts, is 5.6h.

What are the months with the lowest UV index in Boston?

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in March in Boston?

The average daily maximum UV index in March is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in March - Boston, MA
  • Average high temperature in March: 6.4°C

The warmest month (with the highest average high temperature) is July (27.6°C).
The month with the lowest average high temperature is January (1.2°C).

  • Average low temperature in March: -0.6°C

The month with the highest average low temperature is July (18.3°C).
The coldest month (with the lowest average low temperature) is January (-5.2°C).

Average pressure in March - Boston, MA
  • Average pressure in March: 1016.8mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in March - Boston, MA
  • Average wind speed in March: 15.2km/h

The windiest month (with the highest average wind speed) is January (15.9km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).

Average humidity in March - Boston, MA
  • Average humidity in March: 73%

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).

Average rainfall in March - Boston, MA
  • Average rainfall in March: 74mm

The wettest months (with the highest rainfall) are March, April and December (74mm).
The driest month (with the least rainfall) is September (32mm).

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 (15.3 days).
The month with the least rainy days is January (7.9 days).

Average snowfall in March - Boston, MA
  • Average snowfall in March: 98mm

The month with the highest snowfall is February (120mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in March - Boston, MA
  • Average snowfall days in March: 6.8 days

Months with the highest number of snowfall days are January and February (7.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in March - Boston, MA
  • Average sea temperature in March: 3.5°C

The best month for swimming (with the highest average sea temperature) is August (20°C).
The coldest month (with the lowest average sea temperature) is February (3.4°C).

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 the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in March: 5.6h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in March - Boston, MA
  • Average sunshine days in March: 14.8 days

The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).

Average UV index in March - Boston, MA
  • Average UV index in March: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in March - Boston, MA
  • Average cloud cover in March: 51

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in March - Boston, MA
  • Average visibility in March: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).