May weather forecast and climate
Newton, MA

Ancient historic buildings within the Union Historic District in Newton City, Massachusetts
Ancient historic buildings within the Union Historic District in Newton City, Massachusetts

Weather in May

May, the last month of the spring, in Newton, is an enjoyable month, with average temperature ranging between max 66.7°F (19.3°C) and min 49.6°F (9.8°C).

Temperature

In Newton, the average high-temperature increases, from a moderate 55.9°F (13.3°C) in April, to a comfortable 66.7°F (19.3°C). In May, in Newton, Massachusetts, the average low-temperature is 49.6°F (9.8°C).

Humidity

The average relative humidity in May is 73%.

Rainfall

In Newton, Massachusetts,, it is raining for 8.9 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, there are 85.9 rainfall days, and 5.87" (149mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Newton are January through May, November and December. May is the last month it regularly snows in Newton. During 0.1 snowfall days, in May, Newton aggregates 0.08" (2mm) of snow. In Newton, during the entire year, snow falls for 18.8 days, and aggregates up to 3.15" (80mm) of snow.

Daylight

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

Sunshine

In May, the average sunshine is 8.5h.

UV index

In Newton, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. 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 Newton?

In Newton, Massachusetts, the average relative humidity in May is 73%.

How much does it rain in Newton in May?

In Newton, Massachusetts, during May, the rain falls for 8.9 days and regularly aggregates up to 0.51" (13mm) of precipitation.

What is the last month it snows in Newton?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Newton aggregates 0.08" (2mm) of snow.

How many hours of daylight does Newton have in May?

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

How long on average sun shines in May in Newton?

The average sunshine in May is 8.5h.

How high is the UV index in May in Newton?

In Newton, Massachusetts, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in May
Newton, MA

Average temperature in May - Newton, MA
  • Average high temperature in May: 66.7°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 (33.6°F).

  • Average low temperature in May: 49.6°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in May
Newton, MA

Average pressure in May - Newton, 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
Newton, MA

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

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in May
Newton, MA

Average humidity in May - Newton, MA
  • Average humidity in May: 73%

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
Newton, MA

Average rainfall in May - Newton, MA
  • Average rainfall in May: 0.51"

The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").

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Average rainfall days in May
Newton, MA

Average rainfall days in May - Newton, MA
  • Average rainfall days in May: 8.9 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).

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Average snowfall in May
Newton, MA

Average snowfall in May - Newton, MA
  • Average snowfall in May: 0.08"

The month with the highest snowfall is December (0.91").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in May
Newton, MA

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

The month with the highest number of snowfall days is January (4.9 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
Newton, MA

Average daylight in May / Average sunshine in May - Newton, 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: 8.5h

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
Newton, MA

Average sunshine days in May - Newton, MA
  • Average sunshine days in May: 18.7 days

Months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).

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Average UV index in May
Newton, MA

Average UV index in May - Newton, 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
Newton, MA

Average cloud cover in May - Newton, 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
Newton, MA

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

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

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