May weather forecast
Cambridge, MA

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The John Weeks Memorial Footbridge in Cambridge, Massachusetts, over the Charles River calm waters, and a distant view of the Havard University student residence unit
The John Weeks Memorial Footbridge in Cambridge, Massachusetts, over the Charles River calm waters, and a distant view of the Havard University student residence unit

Weather in May

The mild weather of April gives way to the warming month of May in Cambridge, Massachusetts. A substantial hike in temperatures makes the days considerably warmer, while evenings remain cool and comfortable. The city landscape is teeming with life as flowers bloom and trees are lush. The temperatures show the approaching summer with averages from 49.8°F (9.9°C) to 66.7°F (19.3°C). This period of pleasant warmth offers the perfect setting for numerous outdoor events and picnics.

Temperature

Cambridge's transition into May is marked by a rise in the average high-temperature, advancing from a moderate 55.6°F (13.1°C) in April to a comfortable 66.7°F (19.3°C). Cambridge records an average low-temperature of 49.8°F (9.9°C) throughout the month of May.

Humidity

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

Rainfall

In Cambridge, in May, it is raining for 7.8 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 81.8 rainfall days, and 5.51" (140mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, in May, Cambridge aggregates 0.04" (1mm) of snow. In Cambridge, during the entire year, snow falls for 16.8 days and aggregates up to 2.4" (61mm) of snow.

Daylight

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

The average sunshine in May in Cambridge is 8.4h.

UV index

In Cambridge, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, a daily UV index of 5 turns into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

May temperatures vary between a high-temperature of 66.7°F (19.3°C) and a low-temperature of 49.8°F (9.9°C).

What is the average humidity in May?

In May, the average relative humidity is 72%.

How many days does it rain in May?

In Cambridge, in May, during 7.8 rainfall days, 0.43" (11mm) of precipitation is typically accumulated.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Cambridge aggregates 0.04" (1mm) of snow.

How many hours of daylight does Cambridge have in May?

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

What time are sunrise and sunset in May?

On the first day of May, 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 Cambridge have in May?

The average sunshine duration in May is 8.4h.

How high is the UV index in May in Cambridge?

In Cambridge, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health risk from 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
Cambridge, MA

Average temperature in May - Cambridge, 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 (33.8°F).

  • Average low temperature in May: 49.8°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in May
Cambridge, MA

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

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in May
Cambridge, MA

Average wind speed in May - Cambridge, MA
  • Average wind speed in May: 7.2mph

The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in May
Cambridge, MA

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

The months with the highest relative humidity are January and February (77%).
The month with the lowest relative humidity is April (69%).

Average rainfall in May
Cambridge, MA

Average rainfall in May - Cambridge, MA
  • Average rainfall in May: 0.43"

The wettest month (with the highest rainfall) is November (0.63").
The driest month (with the least rainfall) is September (0.2").

Average rainfall days in May
Cambridge, MA

Average rainfall days in May - Cambridge, MA
  • Average rainfall days in May: 7.8 days

The month with the highest number of rainy days is July (9.6 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in May
Cambridge, MA

Average snowfall in May - Cambridge, MA
  • Average snowfall in May: 0.04"

The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in May
Cambridge, MA

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

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in May /
Average sunshine in May
Cambridge, MA

Average daylight in May / Average sunshine in May - Cambridge, 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).

Average sunshine days in May
Cambridge, MA

Average sunshine days in May - Cambridge, MA
  • Average sunshine days in May: 19.4 days

The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is June (17.4 days).

Average UV index in May
Cambridge, MA

Average UV index in May - Cambridge, 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).

Average cloud cover in May
Cambridge, MA

Average cloud cover in May - Cambridge, 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).

Average visibility in May
Cambridge, MA

Average visibility in May - Cambridge, 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).

Cambridge, Massachusetts, USA

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