May weather forecast
Boston, NY

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Weather in May

The last month of the spring, May, is a comfortable month in Boston, New York, with temperature in the range of an average high of 65.3°F (18.5°C) and an average low of 46.6°F (8.1°C).

Temperature

The shift from April to May brings an increase in the average high-temperature, moving from a cool 52°F (11.1°C) to a comfortable 65.3°F (18.5°C). An average minimum temperature of 46.6°F (8.1°C) marks the month of May.

Humidity

The least humid month is May, with an average relative humidity of 79%.

Rainfall

May is the month with the most rainfall in Boston. Rain falls for 15.6 days and accumulates 2.13" (54mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.7 snowfall days, in May, Boston aggregates 0.28" (7mm) of snow. In Boston, during the entire year, snow falls for 71.6 days and aggregates up to 19.21" (488mm) of snow.

Daylight

In Boston, the average length of the day in May is 14h and 38min.
On the first day of the month, sunrise is at 6:08 am and sunset at 8:15 pm. On the last day of May, in Boston, sunrise is at 5:39 am and sunset at 8:45 pm EDT.

Sunshine

In Boston, the average sunshine in May is 8.8h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index in Boston. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In May, the UV index of 5 transforms into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What is the average May temperature in Boston?

In May, in Boston, the average high-temperature is 65.3°F (18.5°C), and the average low-temperature is 46.6°F (8.1°C).

What is the least humid month in Boston?

With an average relative humidity of 79%, May is the least humid month in Boston.

What is the average humidity in May in Boston?

In Boston, New York, the average relative humidity in May is 79%.

What is the rainiest month in Boston?

The month with the most rainfall is May, when the rain falls for 15.6 days and typically aggregates up to 2.13" (54mm) of precipitation.

How much does it rain in Boston in May?

In Boston, in May, it is raining for 15.6 days, with typically 2.13" (54mm) of accumulated precipitation.

What is the last month it snows in Boston?

May is the last month it regularly snows in Boston, New York. During 0.7 snowfall days, in May, Boston aggregates 0.28" (7mm) of snow.

How many hours of daylight does Boston have in May?

The average day length in May is 14h and 38min.

When are sunrise and sunset in May in Boston?

On the first day of May in Boston, sunrise is at 6:08 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:45 pm EDT.

How many hours of sunshine does Boston have in May?

In Boston, New York, the average sunshine duration in May is 8.8h.

When is the highest UV index in Boston?

The months with the highest UV index are May through August, with an average maximum UV index of 5.

What is the UV index reading in May in Boston?

In May, the average daily maximum UV index in Boston, New York, is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Boston, NY

Average temperature in May - Boston, NY
  • Average high temperature in May: 65.3°F

The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in May: 46.6°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

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Average pressure in May
Boston, NY

Average pressure in May - Boston, NY
  • Average pressure in May: 29.99"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Boston, NY

Average wind speed in May - Boston, NY
  • Average wind speed in May: 7.8mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in May
Boston, NY

Average humidity in May - Boston, NY
  • Average humidity in May: 79%

The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (79%).

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Average rainfall in May
Boston, NY

Average rainfall in May - Boston, NY
  • Average rainfall in May: 2.13"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is September (1.22").

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Average rainfall days in May
Boston, NY

Average rainfall days in May - Boston, NY
  • Average rainfall days in May: 15.6 days

The month with the highest number of rainy days is October (17.2 days).
The month with the least rainy days is February (5.8 days).

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Average snowfall in May
Boston, NY

Average snowfall in May - Boston, NY
  • Average snowfall in May: 0.28"

The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Boston, NY

Average snowfall days in May - Boston, NY
  • Average snowfall days in May: 0.7 days

The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Boston, NY

Average daylight in May / Average sunshine in May - Boston, NY
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 8h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

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Average sunshine days in May
Boston, NY

Average sunshine days in May - Boston, NY
  • Average sunshine days in May: 12.5 days

The month with the most sunshine days is September (14 days).
The month with the least sunshine days is January (8.6 days).

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Average UV index in May
Boston, NY

Average UV index in May - Boston, NY
  • Average UV index in May: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in May
Boston, NY

Average cloud cover in May - Boston, NY
  • Average cloud cover in May: 44

The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in May
Boston, NY

Average visibility in May - Boston, NY
  • Average visibility in May: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

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Boston, New York, USA

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