March weather forecast
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

Weather in March

March, the first month of the spring in Boston, is a frosty month, with an average temperature fluctuating between 30.9°F (-0.6°C) and 43.5°F (6.4°C).

Temperature

In March, the average high-temperature slightly increases from a wintry 36.5°F (2.5°C) in February to a frosty 43.5°F (6.4°C). The average low-temperature, in Boston, is 30.9°F (-0.6°C).

Humidity

In March, the average relative humidity is 73%.

Rainfall

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

Snowfall

January through May, October through December are months with snowfall in Boston. In Boston, 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 in Boston, Massachusetts, is 38.3°F (3.5°C).
Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

In March, the average length of the day in Boston is 11h and 58min.
On the first day of the month, sunrise is at 6:19 am and sunset at 5:33 pm EST. On the last day of March, sunrise is at 6:28 am and sunset at 7:08 pm EDT.
Note: On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 5. 2023, at 2:00 am; consequently, the time zone reverts from EDT to EST.

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. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in March interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in March in Boston?

In March, the average high-temperature is 43.5°F (6.4°C), and the average low-temperature is 30.9°F (-0.6°C).

What is the average humidity in March in Boston?

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

What is the wettest month in Boston?

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

How much does it rain in Boston in March?

In Boston, in March, it is raining for 11.6 days, with typically 2.91" (74mm) of accumulated precipitation.

How many days does it snow in March in Boston?

In Boston, Massachusetts, during March, snow falls for 6.8 days and regularly aggregates up to 3.86" (98mm) of snow.

What is the water temperature in March in Boston?

In Boston, the average seawater temperature in March 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.

What is the average length of the day in March in Boston?

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

What time are sunrise and sunset in March in Boston?

On the first day of March in Boston, Massachusetts, sunrise is at 6:19 am and sunset at 5:33 pm EST. On the last day of the month, sunrise is at 6:28 am and sunset at 7:08 pm EDT.

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

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Boston, Massachusetts, and the time zone changes from EST to EDT. DST ends Sunday, November 5. 2023, at 2:00 am.

How long on average sun shines in March in Boston?

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

When is the lowest UV index in Boston?

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

What is the UV index intensity in March in Boston?

In Boston, Massachusetts, the average daily maximum UV index in March is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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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).

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