August weather forecastPlymouth, MA
August
Weather in August
August marks the zenith of summer in Plymouth, Massachusetts, featuring steady high temperatures, ample sunshine, and relatively low rainfall. Weather in August matures into a seamless continuation of July's warmth, with an added touch of shrinking daylight hours. Sea temperatures in August reach their peak, averaging around 68.4°F (20.2°C), prompting frequent dips in Plymouth's inviting beaches. As the northern hemisphere approaches the end of this sultry season, Plymouth locals soak in every last drop of August's radiant sun rays. The quantifiable blend of sunshine and sea makes the August sun in Plymouth a coveted summer end.Temperature
August's presence records an average high-temperature of a still warm 76.6°F (24.8°C), closely mirroring July's climate. During the month of August, Plymouth anticipates a mean low-temperature of 65.7°F (18.7°C).Humidity
The average relative humidity in August is 78%.Rainfall
In August, the rain falls for 11.8 days. Throughout August, 1.34" (34mm) of precipitation is accumulated. 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.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 68.5°F (20.3°C).Note: In water with a temperature of 68.5°F (20.3°C), swimming is not a joy for most people. The challenge of controlling breathing increases as the temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Plymouth, the average length of the day in August is 13h and 49min.On the first day of the month, sunrise is at 5:37 am and sunset at 8:00 pm. On the last day of August, sunrise is at 6:08 am and sunset at 7:17 pm EDT.
Sunshine
The month with the most sunshine is August, 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. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In August, the maximum UV index of 6 suggests this advice:
Escape overexposure. People with light skin may incur burns in fewer 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. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in August /
Average sunshine in August
Plymouth, MA
- Average daylight in August: 13h and 48min
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 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).
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).
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).
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).
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).
