August weather forecast
Plymouth, MA

The white colonial houses in Plymouth, Massachusetts, with the US flag flying
The white colonial houses in Plymouth, Massachusetts, with the US flag flying

Weather in August

The last month of the summer, August, is another warm month in Plymouth, Massachusetts, with temperature in the range of an average low of 65.7°F (18.7°C) and an average high of 76.6°F (24.8°C).

Temperature

In Plymouth, the average high-temperature in August is essentially the same as in July - a still moderately hot 76.6°F (24.8°C). The average low-temperature, in August, is 65.7°F (18.7°C).

Humidity

The average relative humidity in August is 78%.

Rainfall

In Plymouth, during August, the rain falls for 11.8 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, there are 132.2 rainfall days, and 16.3" (414mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Plymouth.

Ocean temperature

August is the month with the warmest seawater in Plymouth, with an average ocean temperature of 68.5°F (20.3°C).
Note: For most, swimming in 68.5°F (20.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in August in Plymouth, Massachusetts, is 13h and 49min.
On the first day of August, sunrise is at 5:36 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 7:18 pm EDT.

Sunshine

August has the most sunshine of the year in Plymouth, with an average of 10.6h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Plymouth. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 temperature in August in Plymouth?

In August, in Plymouth, the average high-temperature is 76.6°F (24.8°C), and the average low-temperature is 65.7°F (18.7°C).

What is the average humidity in August in Plymouth?

In August, the average relative humidity in Plymouth, Massachusetts, is 78%.

How many days does it rain in August in Plymouth?

In August, in Plymouth, the rain falls for 11.8 days. Throughout August, 1.34" (34mm) of precipitation is accumulated.

When it does not snow in Plymouth?

May through October are months without snowfall.

What month is the ocean warmest in Plymouth?

With an average ocean temperature of 68.5°F (20.3°C), August is the month with the warmest seawater.

How cold is the water in August in Plymouth?

In Plymouth, Massachusetts, in August, the average water temperature is 68.5°F (20.3°C). Swimming in 68.5°F (20.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

In Plymouth, Massachusetts, the average day length in August is 13h and 49min.

When is the sunrise / sunset in August in Plymouth?

On the first day of August, sunrise is at 5:36 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 7:18 pm EDT.

What month has the most sunshine in Plymouth?

August has the most sunshine of the year in Plymouth, with an average of 10.6h of sunshine.

How many hours of sunshine does Plymouth have in August?

In Plymouth, the average sunshine duration in August is 10.6h.

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

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

How high is the UV index in August in Plymouth?

In Plymouth, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to 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
Plymouth, MA

Average temperature in August - Plymouth, MA
  • Average high temperature in August: 76.6°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in August: 65.7°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in August
Plymouth, MA

Average pressure in August - Plymouth, 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
Plymouth, MA

Average wind speed in August - Plymouth, MA
  • Average wind speed in August: 7.8mph

The windiest month (with the highest average wind speed) is January (12.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

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Average humidity in August
Plymouth, MA

Average humidity in August - Plymouth, MA
  • Average humidity in August: 78%

The month with the highest relative humidity is July (80%).
The months with the lowest relative humidity are March, April and November (74%).

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Average rainfall in August
Plymouth, MA

Average rainfall in August - Plymouth, MA
  • Average rainfall in August: 1.34"

The wettest months (with the highest rainfall) are July and October (1.65").
The driest month (with the least rainfall) is February (1.02").

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Average rainfall days in August
Plymouth, MA

Average rainfall days in August - Plymouth, MA
  • Average rainfall days in August: 11.8 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in August
Plymouth, MA

Average snowfall in August - Plymouth, MA
  • Average snowfall in August: 0"

The month with the highest snowfall is March (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Plymouth, MA

Average snowfall days in August - Plymouth, MA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in August
Plymouth, MA

Average sea temperature in August - Plymouth, MA
  • Average sea temperature in August: 68.4°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

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Average daylight in August /
Average sunshine in August
Plymouth, MA

Average daylight in August / Average sunshine in August - Plymouth, MA
  • Average daylight in August: 13h and 49min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

  • Average sunshine in August: 10h and 36min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).

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Average sunshine days in August
Plymouth, MA

Average sunshine days in August - Plymouth, MA
  • Average sunshine days in August: 16.3 days

The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (14.8 days).

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Average UV index in August
Plymouth, MA

Average UV index in August - Plymouth, 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
Plymouth, MA

Average cloud cover in August - Plymouth, MA
  • Average cloud cover in August: 29

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in August
Plymouth, MA

Average visibility in August - Plymouth, 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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