April 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 April

April in Boston, Massachusetts, is a cool spring month, with an average temperature ranging between min 40.5°F (4.7°C) and max 55.2°F (12.9°C).

Temperature

In Boston, the average high-temperature in April rises from a frosty 43.5°F (6.4°C) in March to a fresh 55.2°F (12.9°C). In Boston, the average low-temperature is 40.5°F (4.7°C).

Humidity

April is the least humid month in Boston, with an average relative humidity of 69%.

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, during 1 snowfall days, 0.79" (20mm) of snow is typically accumulated. In Boston, during the entire year, snow falls for 29.8 days and aggregates up to 15.75" (400mm) of snow.

Ocean temperature

In Boston, the average water temperature is 43.2°F (6.2°C).
Note: Swimming in 43.2°F (6.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In April, the average length of the day in Boston is 13h and 24min.
On the first day of April, sunrise is at 6:26 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:42 pm EDT.

Sunshine

In April, the average sunshine in Boston is 8h.

UV index

In Boston, Massachusetts, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in April transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the least humid month in Boston?

With an average relative humidity of 69%, April is the least humid month in Boston.

What is the average humidity in April in Boston?

The average relative humidity in April in Boston, Massachusetts, is 69%.

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 April?

In Boston, Massachusetts, during April, the rain falls for 14.8 days and regularly aggregates up to 2.91" (74mm) of precipitation.

How much does it snow in Boston in April?

In Boston, in April, snow falls for 1 days, with typically accumulated 0.79" (20mm) of snow.

What is the ocean temperature in April in Boston?

In Boston, Massachusetts, the average seawater temperature in April is 43.2°F (6.2°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Boston have in April?

In April, the average day length in Boston, Massachusetts, is 13h and 24min.

What time are sunrise and sunset in April in Boston?

In April, on the first day of the month, sunrise is at 6:26 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:42 pm EDT.

How many hours of sunshine does Boston have in April?

In April, the average sunshine duration is 8h.

What is the UV index intensity in April in Boston?

In Boston, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Average temperature in April
Boston, MA

Average temperature in April - Boston, MA
  • Average high temperature in April: 55.2°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 April: 40.5°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 April
Boston, MA

Average pressure in April - Boston, MA
  • Average pressure in April: 29.97"

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

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Average wind speed in April
Boston, MA

Average wind speed in April - Boston, MA
  • Average wind speed in April: 8.6mph

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 April
Boston, MA

Average humidity in April - Boston, MA
  • Average humidity in April: 69%

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 April
Boston, MA

Average rainfall in April - Boston, MA
  • Average rainfall in April: 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 April
Boston, MA

Average rainfall days in April - Boston, MA
  • Average rainfall days in April: 14.8 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 April
Boston, MA

Average snowfall in April - Boston, MA
  • Average snowfall in April: 0.79"

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 April
Boston, MA

Average snowfall days in April - Boston, MA
  • Average snowfall days in April: 1 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 April
Boston, MA

Average sea temperature in April - Boston, MA
  • Average sea temperature in April: 43.1°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 April /
Average sunshine in April
Boston, MA

Average daylight in April / Average sunshine in April - Boston, MA
  • Average daylight in April: 13h and 24min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in April: 8h

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

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Average sunshine days in April
Boston, MA

Average sunshine days in April - Boston, MA
  • Average sunshine days in April: 13 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 April
Boston, MA

Average UV index in April - Boston, MA
  • Average UV index in April: 3

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 April
Boston, MA

Average cloud cover in April - Boston, MA
  • Average cloud cover in April: 47

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 April
Boston, MA

Average visibility in April - Boston, MA
  • Average visibility in April: 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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