March weather forecast
Boston, MA

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A beautiful natural park with the George Washington Monument in Boston, Massachusetts
A beautiful natural park with the George Washington Monument in Boston, Massachusetts

Weather in March

March in Boston is a transitional period, moving from winter to the refreshing spring season. Noticeable changes in the weather patterns occur as compared to February's dominant cold. The region witnesses highs and lows from 43.5°F (6.4°C) to 30.9°F (-0.6°C). Bostonians start shedding their wintery layers gradually, and occasional outdoor activities become delightful. Towards the end of the month, the city starts revealing its spring beauty, with the blooming of flowers in public parks and landscapes.

Temperature

As March arrives, a slight rise in the average high-temperature is observed, moving from an icy 36.5°F (2.5°C) in February to a frosty 43.5°F (6.4°C). In Boston, March is marked by an average low-temperature of 30.9°F (-0.6°C).

Humidity

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

Rainfall

The 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. In Boston, in March, snow falls for 6.8 days, with typically accumulated 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 March, the average ocean temperature is 38.3°F (3.5°C).
Note: During swimming events, this situation presents an imminent life risk. Instantaneous loss of breath control makes clear thinking a near impossibility. A specialized swimsuit is compulsory to limit thermal dissipation.

Daylight

The average length of the day in March is 11h and 58min.
On the first day of March, sunrise is at 6:18 am and sunset at 5:34 pm EST. On the last day of the month, sunrise is at 6:26 am and sunset at 7:09 pm EDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

In March, the average sunshine is 5.6h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In March, a daily maximum UV index of 2 leads to the following instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold is it in March?

March temperatures in Boston vary between a high-temperature of 43.5°F (6.4°C) and a low-temperature of 30.9°F (-0.6°C).

What is the average humidity in March?

The average relative humidity in March is 73%.

What is the rainiest month?

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

How much does it rain in March?

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

How many days does it snow in March?

In Boston, in March, during 6.8 snowfall days, 3.86" (98mm) of snow is typically accumulated.

How cold is the water in March?

In Boston, in March, the average water temperature is 38.3°F (3.5°C). 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.

How many hours of daylight does Boston have in March?

In Boston, the average day length in March is 11h and 58min.

When is the sunrise / sunset in March?

On the first day of March, sunrise is at 6:18 am and sunset at 5:34 pm EST. On the last day of the month, sunrise is at 6:26 am and sunset at 7:09 pm EDT.

When does Daylight Saving Time (DST) start in March?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How long on average sun shines in March?

In Boston, the average sunshine duration in March is 5.6h.

When is the lowest UV index?

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

How high is the UV index in March?

In Boston, the average daily maximum UV index in March is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Boston, MA

Average temperature in March - Boston, MA
  • Average high temperature in March: 43.5°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).

  • Average low temperature in March: 30.9°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in March
Boston, MA

Average pressure in March - Boston, MA
  • Average pressure in March: 30.03"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in March
Boston, MA

Average wind speed in March - Boston, MA
  • Average wind speed in March: 9.4mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

Average humidity in March
Boston, MA

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 - Boston, MA
  • Average rainfall in March: 2.91"

The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").

Average rainfall days in March
Boston, MA

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 - Boston, MA
  • Average snowfall in March: 3.86"

The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in March
Boston, MA

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

The months with the highest number of snowfall days are January and February (7.6 days).
The 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 - 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 / Average sunshine in March - Boston, MA
  • Average daylight in March: 12h and 0min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in March: 5h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in March
Boston, MA

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

The months with the highest UV index are June, July and August (UV index 6).
The 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 - 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 - Boston, MA
  • Average visibility in March: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Boston, Massachusetts, USA

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