August weather forecast
South Yarmouth, MA

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Weather in August

August, the last month of the summer in South Yarmouth, is another pleasant month, with an average temperature varying between 68.5°F (20.3°C) and 72.1°F (22.3°C).

Temperature

In South Yarmouth, the month of August registers the highest temperatures, averaging 72.1°F (22.3°C) at the peak and 68.5°F (20.3°C) at the lowest.

Humidity

The average relative humidity in August in South Yarmouth is 81%.

Rainfall

The month with the least rainfall is August, when the rain falls for 11.2 days and typically collects 0.94" (24mm) of precipitation.

Snowfall

In South Yarmouth, snow does not fall in May through November.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 67.5°F (19.7°C).
Note: The majority of individuals find it unpleasurable to swim in 67.5°F (19.7°C). It becomes progressively harder to manage one's breathing as the water temperature falls below 69.8°F (21°C).

Daylight

In August, the average length of the day in South Yarmouth is 13h and 48min.
On the first day of the month, sunrise is at 5:35 am and sunset at 7:58 pm. On the last day of August, in South Yarmouth, sunrise is at 6:06 am and sunset at 7:15 pm EDT.

Sunshine

With an average of 10.8h of sunshine, August has the most sunshine of the year.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. 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. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

What part of the year is the hottest in South Yarmouth?

The warmest month in South Yarmouth, Massachusetts, is August, with an average high-temperature of 72.1°F (22.3°C) and an average low-temperature of 68.5°F (20.3°C).

What is the average August temperature in South Yarmouth?

In South Yarmouth, 72.1°F (22.3°C) is the average high-temperature and 68.5°F (20.3°C) is the average low-temperature during August.

What is the average humidity in August in South Yarmouth?

In August, the average relative humidity in South Yarmouth, Massachusetts, is 81%.

What is the driest month in South Yarmouth?

August is the month with the least rainfall in South Yarmouth, Massachusetts. Rain falls for 11.2 days and accumulates 0.94" (24mm) of precipitation.

How much does it rain in South Yarmouth in August?

In South Yarmouth, Massachusetts, in August, it is raining for 11.2 days, with typically 0.94" (24mm) of accumulated precipitation.

When it does not snow in South Yarmouth?

May through November are months without snowfall in South Yarmouth.

When is the ocean warmest in South Yarmouth?

August is the month with the warmest seawater in South Yarmouth, Massachusetts, with an average ocean temperature of 67.5°F (19.7°C).

How cold is the water in August in South Yarmouth?

In South Yarmouth, Massachusetts, in August, the average water temperature is 67.5°F (19.7°C). Swimming in 67.5°F (19.7°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does South Yarmouth have in August?

The average day length in August is 13h and 48min.

What time are sunrise and sunset in August in South Yarmouth?

In August, on the first day of the month, sunrise is at 5:35 am and sunset at 7:58 pm. On the last day of the month, in South Yarmouth, Massachusetts, sunrise is at 6:06 am and sunset at 7:15 pm EDT.

What month has the most sunshine in South Yarmouth?

With an average of 10.8h of sunshine, August has the most sunshine of the year in South Yarmouth.

How many hours of sunshine does South Yarmouth have in August?

In South Yarmouth, Massachusetts, the average sunshine duration in August is 10.8h.

What is the month with the highest UV index in South Yarmouth?

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

How high is the UV index in August in South Yarmouth?

In South Yarmouth, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe 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
South Yarmouth, MA

Average temperature in August - South Yarmouth, MA
  • Average high temperature in August: 72.1°F

The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in August: 68.5°F

The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in August
South Yarmouth, MA

Average pressure in August - South Yarmouth, 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
South Yarmouth, MA

Average wind speed in August - South Yarmouth, MA
  • Average wind speed in August: 10.9mph

The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).

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Average humidity in August
South Yarmouth, MA

Average humidity in August - South Yarmouth, MA
  • Average humidity in August: 81%

The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in August
South Yarmouth, MA

Average rainfall in August - South Yarmouth, MA
  • Average rainfall in August: 0.94"

The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").

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Average rainfall days in August
South Yarmouth, MA

Average rainfall days in August - South Yarmouth, MA
  • Average rainfall days in August: 11.2 days

The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in August
South Yarmouth, MA

Average snowfall in August - South Yarmouth, MA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.87").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in August
South Yarmouth, MA

Average snowfall days in August - South Yarmouth, MA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.4 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
South Yarmouth, MA

Average sea temperature in August - South Yarmouth, MA
  • Average sea temperature in August: 67.5°F

The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

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Average daylight in August /
Average sunshine in August
South Yarmouth, MA

Average daylight in August / Average sunshine in August - South Yarmouth, 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 12min).

  • Average sunshine in August: 10h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).

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Average sunshine days in August
South Yarmouth, MA

Average sunshine days in August - South Yarmouth, MA
  • Average sunshine days in August: 18.3 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).

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Average UV index in August
South Yarmouth, MA

Average UV index in August - South Yarmouth, MA
  • Average UV index in August: 6

The months with the highest UV index are 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
South Yarmouth, MA

Average cloud cover in August - South Yarmouth, MA
  • Average cloud cover in August: 27

The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in August
South Yarmouth, MA

Average visibility in August - South Yarmouth, 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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South Yarmouth, Massachusetts, USA

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