July weather forecast and climate
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
July, like June, in Cambridge, Massachusetts, is a moderately hot summer month, with average temperature fluctuating between 81.9°F (27.7°C) and 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

In July, the average heat index is appraised at a tropical 86.9°F (30.5°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, wind, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Cambridge is 73%.

Rainfall

In Cambridge, during July, the rain falls for 9.6 days and regularly aggregates up to 0.47" (12mm) of precipitation. In Cambridge, Massachusetts, 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

In July, the average length of the day in Cambridge is 14.9h.

Sunshine

In July, the average sunshine in Cambridge 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 of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the warmest month in Cambridge?

The warmest month in Cambridge, Massachusetts, 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 July, in Cambridge, 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. 'felt air temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, in July is evaluated at 86.9°F (30.5°C).

What is the average humidity in July in Cambridge?

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

How much does it rain in Cambridge in July?

In Cambridge, during July, the rain falls for 9.6 days and regularly aggregates up to 0.47" (12mm) of precipitation.

When it does not snow in Cambridge?

In Cambridge snow does not fall in June through October.

How many hours of daylight does Cambridge have in July?

The average length of the day in July in Cambridge, Massachusetts, is 14.9h.

How long on average sun shines in July in Cambridge?

The average sunshine in July is 10.2h.

When is the highest UV index in Cambridge?

Months with the highest UV index in Cambridge 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 in Cambridge is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.
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: 29.94"

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

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: 73%

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: 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: 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: 0"

The month with the highest snowfall is December (0.71").
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: 0 days

The month with the highest number of snowfall days is January (4.8 days).
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: 14.9h

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 July: 10.2h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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: 6

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).

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: 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).