July weather forecast
Cambridge, MA

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 July

July, like June, in Cambridge, Massachusetts, is a moderately hot summer month, with an average temperature ranging between max 81.9°F (27.7°C) and min 64.6°F (18.1°C).

Temperature

July is the warmest month, with an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 64.6°F (18.1°C).

Heat index

The average heat index in July is evaluated at a tropical 86.9°F (30.5°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, pregnancy, wind, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Cambridge, the average relative humidity in July is 73%.

Rainfall

In Cambridge, in July, during 9.6 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In Cambridge, during the entire year, the rain falls for 81.8 days and collects up to 5.51" (140mm) of precipitation.

Snowfall

In Cambridge, snow does not fall in June through October.

Daylight

The average length of the day in July is 14h and 55min.
On the first day of the month, sunrise is at 5:11 am and sunset at 8:25 pm. On the last day of July, in Cambridge, sunrise is at 5:36 am and sunset at 8:05 pm EDT.

Sunshine

The average sunshine in July is 10.2h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Cambridge. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.
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FAQ

What is the warmest month in Cambridge?

The warmest month in Cambridge is July, with an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 64.6°F (18.1°C).

What is the temperature in July in Cambridge?

In Cambridge, Massachusetts, in July, the average high-temperature is 81.9°F (27.7°C), and the average low-temperature is 64.6°F (18.1°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in July is evaluated at 86.9°F (30.5°C).

What is the average humidity in July in Cambridge?

The average relative humidity in July in Cambridge, Massachusetts, is 73%.

How many days does it rain in July in Cambridge?

In Cambridge, Massachusetts, in July, it is raining for 9.6 days, with typically 0.47" (12mm) of accumulated precipitation.

When it does not snow in Cambridge?

June through October are months without snowfall.

How many hours of daylight does Cambridge have in July?

In Cambridge, Massachusetts, the average day length in July is 14h and 55min.

What time are sunrise and sunset in July in Cambridge?

In July, on the first day of the month, sunrise is at 5:11 am and sunset at 8:25 pm. On the last day of the month, in Cambridge, sunrise is at 5:36 am and sunset at 8:05 pm EDT.

How many hours of sunshine does Cambridge have in July?

The average sunshine duration in July in Cambridge, Massachusetts, is 10.2h.

What is the month with the highest UV index in Cambridge?

The months with the highest UV index in Cambridge, Massachusetts, are June through August, with an average maximum UV index of 6.

What is the UV index intensity in July in Cambridge?

In July, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Cambridge, MA

Average temperature in July - Cambridge, MA
  • Average high temperature in July: 81.9°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 July: 64.6°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).

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Average pressure in July
Cambridge, MA

Average pressure in July - Cambridge, MA
  • Average pressure in July: 29.94"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).

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Average wind speed in July
Cambridge, MA

Average wind speed in July - Cambridge, MA
  • Average wind speed in July: 6.1mph

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).

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Average humidity in July
Cambridge, MA

Average humidity in July - Cambridge, MA
  • Average humidity in July: 73%

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

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Average rainfall in July
Cambridge, MA

Average rainfall in July - Cambridge, MA
  • Average rainfall in July: 0.47"

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

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Average rainfall days in July
Cambridge, MA

Average rainfall days in July - Cambridge, MA
  • Average rainfall days in July: 9.6 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).

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Average snowfall in July
Cambridge, MA

Average snowfall in July - Cambridge, MA
  • Average snowfall in July: 0"

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

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Average snowfall days in July
Cambridge, MA

Average snowfall days in July - Cambridge, MA
  • Average snowfall days in July: 0 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).

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

Average daylight in July / Average sunshine in July - Cambridge, MA
  • Average daylight in July: 14h and 55min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in July: 10h and 12min

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 July
Cambridge, MA

Average sunshine days in July - Cambridge, MA
  • Average sunshine days in July: 18 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).

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Average UV index in July
Cambridge, MA

Average UV index in July - Cambridge, MA
  • Average UV index in July: 6

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 July
Cambridge, MA

Average cloud cover in July - Cambridge, MA
  • Average cloud cover in July: 34

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 July
Cambridge, MA

Average visibility in July - Cambridge, MA
  • Average visibility in July: 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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