May weather forecast and climate
Arlington, MA

Weather in May

The last month of the spring, May, is a comfortable month in Arlington, Massachusetts, with average temperature ranging between min 49.6°F (9.8°C) and max 66.7°F (19.3°C).

Temperature

In Arlington, Massachusetts, the average high-temperature in May rises, from a mild 55.8°F (13.2°C) in April, to a comfortable 66.7°F (19.3°C). In Arlington, in May, the average low-temperature is 49.6°F (9.8°C).

Humidity

In May, the average relative humidity in Arlington, Massachusetts, is 72%.

Rainfall

In Arlington, Massachusetts, during May, the rain falls for 15.3 days and regularly aggregates up to 1.97" (50mm) of precipitation. Throughout the year, in Arlington, Massachusetts, there are 142.8 rainfall days, and 27.36" (695mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Arlington are January through May, October through December. May is the last month it regularly snows in Arlington, Massachusetts. During 0.1 snowfall days, Arlington aggregates 0.16" (4mm) of snow. In Arlington, Massachusetts, during the entire year, snow falls for 29.6 days, and aggregates up to 17.8" (452mm) of snow.

Daylight

In May, the average length of the day in Arlington is 14.6h.

Sunshine

In Arlington, the average sunshine is 8.4h.

UV index

The average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
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. 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. 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 average humidity in May in Arlington?

In Arlington, the average relative humidity in May is 72%.

How much does it rain in Arlington in May?

In Arlington, in May, during 15.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

What is the last month it snows in Arlington?

May is the last month it regularly snows in Arlington. During 0.1 snowfall days, in May, Arlington aggregates 0.16" (4mm) of snow.

How many hours of daylight does Arlington have in May?

The average length of the day in May in Arlington, Massachusetts, is 14.6h.

How many hours of sunshine does Arlington have in May?

The average sunshine in May in Arlington, Massachusetts, is 8.4h.

What is the UV index reading in May in Arlington?

In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in May
Arlington, MA

Average temperature in May - Arlington, MA
  • Average high temperature in May: 66.7°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in May: 49.6°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in May
Arlington, MA

Average pressure in May - Arlington, MA
  • Average pressure in May: 30.01"

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

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Average wind speed in May
Arlington, MA

Average wind speed in May - Arlington, MA
  • Average wind speed in May: 7.1mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

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Average humidity in May
Arlington, MA

Average humidity in May - Arlington, MA
  • Average humidity in May: 72%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in May
Arlington, MA

Average rainfall in May - Arlington, MA
  • Average rainfall in May: 1.97"

The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.3").

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Average rainfall days in May
Arlington, MA

Average rainfall days in May - Arlington, MA
  • Average rainfall days in May: 15.3 days

Months with the highest number of rainy days are May and July (15.3 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in May
Arlington, MA

Average snowfall in May - Arlington, MA
  • Average snowfall in May: 0.16"

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

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Average snowfall days in May
Arlington, MA

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

The month with the highest number of snowfall days is January (7.7 days).
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
Arlington, MA

Average daylight in May / Average sunshine in May - Arlington, MA
  • Average daylight in May: 14.6h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in May: 8.4h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in May
Arlington, MA

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

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is April (13.3 days).

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Average UV index in May
Arlington, MA

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

Months with the highest UV index are June, July and August (UV index 6).
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
Arlington, MA

Average cloud cover in May - Arlington, MA
  • Average cloud cover in May: 46

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in May
Arlington, MA

Average visibility in May - Arlington, MA
  • Average visibility in May: 6mi

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

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