July 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 July

July is the prime summer month in Cambridge, Massachusetts, showcasing the year's highest temperatures. Frequent trips to nearby lakes and beaches become a favorite pastime for residents. Clear blue skies, vibrant green landscapes, and warmer nights describe this quintessential summer month. The mercury ascends to higher levels during this period, stirring between 64.6°F (18.1°C) and a striking 81.9°F (27.7°C). It's an opportune time for engaging in water sports or attending music festivals in the city.

Temperature

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

Heat index

In July, the average heat index is estimated at a tropical 86°F (30°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. 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 extremely significant for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.

Humidity

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. Throughout the year, there are 81.8 rainfall days, and 5.51" (140mm) of precipitation is accumulated.

Snowfall

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

Daylight

In July, the average length of the day 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, sunrise is at 5:36 am and sunset at 8:04 pm EDT.

Sunshine

In Cambridge, 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. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In July, the maximum UV index of 6 suggests these recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Frequently asked questions

What is the warmest month?

July, characterized by an average high temperature of 81.9°F (27.7°C) and a low temperature of 64.6°F (18.1°C), is generally the warmest month.

What is the temperature in July?

In Cambridge, 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. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in July is estimated at 86°F (30°C).

What is the average humidity in July?

The average relative humidity in July is 73%.

How many days does it rain in July?

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

When it does not snow?

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

What is the average length of the day in July?

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

What time are sunrise and sunset in July?

On the first day of July, sunrise is at 5:11 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:04 pm EDT.

How long on average sun shines in July?

In July, the average sunshine duration is 10.2h.

What is the month with the highest UV index?

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

How high is the UV index in July?

In Cambridge, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
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 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).

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).

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).

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%).

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").

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).

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").

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).

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 5min

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 July: 10h and 1min

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 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).

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).

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).

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).

Cambridge, Massachusetts, USA

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