May weather forecast
Needham, MA

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Weather in May

The last month of the spring, May, is an enjoyable month in Needham, Massachusetts, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 49.6°F (9.8°C).

Temperature

Needham, Massachusetts, sees an increase in average high-temperatures during May, moving from a mild 55.9°F (13.3°C) in April to a still refreshing 66.7°F (19.3°C). During May, Needham sees a mean low-temperature of 49.6°F (9.8°C).

Humidity

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

Rainfall

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

Snowfall

Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Needham aggregates 0.08" (2mm) of snow. In Needham, Massachusetts, 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 in Needham is 14h and 37min.
On the first day of the month, sunrise is at 5:39 am and sunset at 7:44 pm. On the last day of May, in Needham, Massachusetts, sunrise is at 5:10 am and sunset at 8:14 pm EDT.

Sunshine

The average sunshine in May is 8.5h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 in May interprets into the following advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the usual temperature for Needham in May?

In May, the average high-temperature and low-temperature in Needham, Massachusetts, are 66.7°F (19.3°C) and 49.6°F (9.8°C) respectively.

What is the average humidity in May in Needham?

The average relative humidity in May in Needham is 73%.

How much does it rain in Needham in May?

In Needham, 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 Needham?

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

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

The average day length in May in Needham is 14h and 37min.

When is the sunrise / sunset in May in Needham?

In May, on the first day of the month, sunrise is at 5:39 am and sunset at 7:44 pm. On the last day of the month, in Needham, Massachusetts, sunrise is at 5:10 am and sunset at 8:14 pm EDT.

How long on average sun shines in May in Needham?

In May, the average sunshine duration in Needham is 8.5h.

What is the UV index reading in May in Needham?

The average daily maximum UV index in May in Needham, Massachusetts, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Needham, MA

Average temperature in May - Needham, 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
Needham, MA

Average pressure in May - Needham, 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
Needham, MA

Average wind speed in May - Needham, 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
Needham, MA

Average humidity in May - Needham, 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
Needham, MA

Average rainfall in May - Needham, 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
Needham, MA

Average rainfall days in May - Needham, 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
Needham, MA

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

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

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Average snowfall days in May
Needham, MA

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

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

Average daylight in May / Average sunshine in May - Needham, 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 3min

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
Needham, MA

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

The 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
Needham, MA

Average UV index in May - Needham, 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
Needham, MA

Average cloud cover in May - Needham, 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
Needham, MA

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

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

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Needham, Massachusetts, USA

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