August 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 August

The city of Cambridge, Massachusetts, experiences an extended summer season in August. The warm weather continues, offering breathtaking sunsets over Charles River and lively evenings in outdoor cafés. Milder nights provide a welcome relief from the heat of the day. The highest temperatures have a slight decline in comparison to July, running from 63.5°F (17.5°C) to 80.4°F (26.9°C). Despite the occasional summer storm, the majority of August days bask in plenty of sunshine.

Temperature

The commencement of August notes an average high-temperature of a still moderately hot 80.4°F (26.9°C), exhibiting little difference from the previous month. Cambridge, during August, witnesses an average low-temperature of 63.5°F (17.5°C).

Humidity

The average relative humidity in August in Cambridge is 73%.

Rainfall

In Cambridge, in August, it is raining for 7.9 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, in Cambridge, Massachusetts, there are 81.8 rainfall days, and 5.51" (140mm) of precipitation is accumulated.

Snowfall

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

Daylight

In August, the average length of the day in Cambridge, Massachusetts, is 13h and 51min.
On the first day of the month, sunrise is at 5:37 am and sunset at 8:03 pm. On the last day of August, sunrise is at 6:09 am and sunset at 7:19 pm EDT.

Sunshine

August has the most sunshine of the year, with an average of 10.5h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Cambridge, Massachusetts. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 6 during August translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

What are August temperatures in Cambridge?

In August, the average high-temperature and low-temperature are 80.4°F (26.9°C) and 63.5°F (17.5°C) respectively. In July, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 86°F (30°C).

What is the average humidity in August in Cambridge?

The average relative humidity in August is 73%.

How many days does it rain in August in Cambridge?

In Cambridge, Massachusetts, in August, it is raining for 7.9 days, with typically 0.39" (10mm) of accumulated precipitation.

When it does not snow in Cambridge?

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

What is the average length of the day in August in Cambridge?

In August, the average day length is 13h and 51min.

When is the sunrise / sunset in August in Cambridge?

In August, on the first day of the month, sunrise is at 5:37 am and sunset at 8:03 pm. On the last day of the month, in Cambridge, Massachusetts, sunrise is at 6:09 am and sunset at 7:19 pm EDT.

What month has the most sunshine in Cambridge?

The month with the most sunshine in Cambridge is August, with an average of 10.5h of sunshine.

How long on average sun shines in August in Cambridge?

The average sunshine duration in August is 10.5h.

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

The 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 August in Cambridge?

In August, the average daily maximum UV index in Cambridge is 6. A UV Index reading of 6 to 7 represents a high hazard to health 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 August
Cambridge, MA

Average temperature in August - Cambridge, MA
  • Average high temperature in August: 80.4°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 August: 63.5°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 August
Cambridge, MA

Average pressure in August - Cambridge, MA
  • Average pressure in August: 29.98"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 August
Cambridge, MA

Average wind speed in August - Cambridge, MA
  • Average wind speed in August: 6mph

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 August
Cambridge, MA

Average humidity in August - Cambridge, MA
  • Average humidity in August: 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 August
Cambridge, MA

Average rainfall in August - Cambridge, MA
  • Average rainfall in August: 0.39"

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 August
Cambridge, MA

Average rainfall days in August - Cambridge, MA
  • Average rainfall days in August: 7.9 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 August
Cambridge, MA

Average snowfall in August - Cambridge, MA
  • Average snowfall in August: 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 August
Cambridge, MA

Average snowfall days in August - Cambridge, MA
  • Average snowfall days in August: 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 August /
Average sunshine in August
Cambridge, MA

Average daylight in August / Average sunshine in August - Cambridge, MA
  • Average daylight in August: 13h 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 August: 10h 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 August
Cambridge, MA

Average sunshine days in August - Cambridge, MA
  • Average sunshine days in August: 19.8 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 August
Cambridge, MA

Average UV index in August - Cambridge, MA
  • Average UV index in August: 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 August
Cambridge, MA

Average cloud cover in August - Cambridge, MA
  • Average cloud cover in August: 32

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 August
Cambridge, MA

Average visibility in August - Cambridge, MA
  • Average visibility in August: 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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Cambridge, Massachusetts, USA

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