May weather forecast
Arlington, MA

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Weather in May

Heading into May, Arlington, Massachusetts experiences further warming, rendering the weather considerably mild. With the growing temperatures, snowfall becomes quite negligible, further solidifying the transition from spring towards summer. It's of significance to note that the snowfall is nearly non-existent in May, amounting to only 0.16" (4mm). As June beckons, the temperatures climb even higher, introducing the summer season. The natural scenery tends to be more lush and bright during May, thanks to the kindness of the weather.

Temperature

Arlington, Massachusetts, sees a rise in temperature during May, with average high-temperatures transitioning from a moderate 55.8°F (13.2°C) in April to a still refreshing 66.7°F (19.3°C). During May in Arlington, the average low-temperature is recorded at a chilly 49.6°F (9.8°C).

Humidity

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

Rainfall

In May, in Arlington, the rain falls for 15.3 days. Throughout May, 1.97" (50mm) of precipitation is accumulated. In Arlington, during the entire year, the rain falls for 142.8 days and collects up to 27.36" (695mm) of precipitation.

Snowfall

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

Daylight

In Arlington, the average length of the day in May is 14h and 37min.
On the first day of the month, sunrise is at 5:38 am and sunset at 7:44 pm. On the last day of May, sunrise is at 5:10 am and sunset at 8:14 pm EDT.

Sunshine

In May, the average sunshine in Arlington is 8.4h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 5 in May interprets into the following advice:
Be vigilant - A duty to shield skin and eyes from injury exists. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the temperature in May in Arlington?

The average high-temperature and low-temperature in Arlington, Massachusetts, during May are 66.7°F (19.3°C) and 49.6°F (9.8°C) respectively.

What is the average humidity in May in Arlington?

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

How many days does it rain in May in Arlington?

In May, in Arlington, Massachusetts, the rain falls for 15.3 days. Throughout May, 1.97" (50mm) of precipitation is 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.

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

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

When are sunrise and sunset in May in Arlington?

On the first day of May in Arlington, Massachusetts, sunrise is at 5:38 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:14 pm EDT.

How many hours of sunshine does Arlington have in May?

In Arlington, Massachusetts, the average sunshine duration in May is 8.4h.

What is the UV index intensity in May in Arlington?

In Arlington, the average daily maximum UV index in May 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 days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"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
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

The 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").
The 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).
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
Arlington, MA

Average daylight in May / Average sunshine in May - Arlington, MA
  • Average daylight in May: 14h and 4min

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 May: 8h and 2min

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 42min).

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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

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
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

The 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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Arlington, Massachusetts, USA

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