May weather forecast
Boylston, MA

Weather in May

The last month of the spring, May, is a comfortable month in Boylston, Massachusetts, with an average temperature fluctuating between 67.5°F (19.7°C) and 47.8°F (8.8°C).

Temperature

In Boylston, Massachusetts, the average high-temperature in May increases from a mild 55.6°F (13.1°C) in April to an enjoyable 67.5°F (19.7°C). The average low-temperature, in Boylston, is 47.8°F (8.8°C).

Humidity

In Boylston, Massachusetts, the average relative humidity in May is 74%.

Rainfall

In Boylston, Massachusetts, during May, the rain falls for 15.8 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, in Boylston, there are 150.4 rainfall days, and 28.86" (733mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Boylston. During 0.1 snowfall days, Boylston aggregates 0.12" (3mm) of snow. Throughout the year, there are 36.5 snowfall days, and 23.82" (605mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 37min.
On the first day of May, sunrise is at 5:41 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 8:16 pm EDT.

Sunshine

In Boylston, the average sunshine in May is 8.3h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in May in Boylston?

In Boylston, Massachusetts, the average relative humidity in May is 74%.

How much does it rain in Boylston in May?

In Boylston, in May, during 15.8 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

What is the last month it snows in Boylston?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Boylston aggregates 0.12" (3mm) of snow.

What is the average length of the day in May in Boylston?

In May, the average day length in Boylston, Massachusetts, is 14h and 37min.

When are sunrise and sunset in May in Boylston?

On the first day of May, sunrise is at 5:41 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 8:16 pm EDT.

How many hours of sunshine does Boylston have in May?

In May, the average sunshine duration in Boylston is 8.3h.

What is the UV index intensity in May in Boylston?

The average daily maximum UV index in May in Boylston is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Boylston, MA

Average temperature in May - Boylston, MA
  • Average high temperature in May: 67.5°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in May: 47.8°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in May
Boylston, MA

Average pressure in May - Boylston, MA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Boylston, MA

Average wind speed in May - Boylston, MA
  • Average wind speed in May: 6.7mph

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in May
Boylston, MA

Average humidity in May - Boylston, MA
  • Average humidity in May: 74%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in May
Boylston, MA

Average rainfall in May - Boylston, MA
  • Average rainfall in May: 2.2"

The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days in May
Boylston, MA

Average rainfall days in May - Boylston, MA
  • Average rainfall days in May: 15.8 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (7.3 days).

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Average snowfall in May
Boylston, MA

Average snowfall in May - Boylston, MA
  • Average snowfall in May: 0.12"

The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Boylston, MA

Average snowfall days in May - Boylston, MA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (9.4 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
Boylston, MA

Average daylight in May / Average sunshine in May - Boylston, MA
  • Average daylight in May: 14h and 37min

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 May: 8h and 18min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in May
Boylston, MA

Average sunshine days in May - Boylston, MA
  • Average sunshine days in May: 13.8 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (12.8 days).

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Average UV index in May
Boylston, MA

Average UV index in May - Boylston, MA
  • Average UV index in May: 5

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 May
Boylston, MA

Average cloud cover in May - Boylston, MA
  • Average cloud cover in May: 47

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in May
Boylston, MA

Average visibility in May - Boylston, MA
  • Average visibility in May: 5mi

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

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