August 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 August

August, the last month of the summer in Cambridge, is also a moderately hot month, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 63.5°F (17.5°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a still moderately hot 80.4°F (26.9°C). In Cambridge, in August, the average low-temperature is 63.5°F (17.5°C).

Humidity

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

Rainfall

In August, the rain falls for 7.9 days. Throughout August, 0.39" (10mm) of precipitation is 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, Massachusetts, snow does not fall in June through October.

Daylight

In Cambridge, the average length of the day in August is 13h and 51min.
On the first day of August in Cambridge, sunrise is at 5:37 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 7:20 pm EDT.

Sunshine

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

UV index

The months with the highest UV index in Cambridge are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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 average humidity in August in Cambridge?

The average relative humidity in August is 73%.

How much does it rain in Cambridge in August?

In Cambridge, 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.

How many hours of daylight does Cambridge have in August?

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

When are sunrise and sunset in August in Cambridge?

On the first day of August, sunrise is at 5:37 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 7:20 pm EDT.

What month has the most sunshine in Cambridge?

With an average of 10.5h of sunshine, August has the most sunshine of the year in Cambridge, Massachusetts.

How many hours of sunshine does Cambridge have in August?

In August, the average sunshine duration in Cambridge is 10.5h.

When is 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.

How high is the UV index in August in Cambridge?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
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 51min

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 August: 10h and 30min

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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