August weather forecastSouth Yarmouth, MA
August
Weather in August
The last month of the summer, August, is also an agreeable month in South Yarmouth, Massachusetts, with an average temperature varying between 72.1°F (22.3°C) and 68.5°F (20.3°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 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
May through November are months without snowfall.Ocean temperature
With an average ocean temperature of 67.5°F (19.7°C), August is the month with the warmest seawater.Note: Swimming is not a pleasurable activity for most people when the water temperature is 67.5°F (19.7°C). Breathing control gets harder as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
In South Yarmouth, the average length of the day in August is 13h and 48min.On the first day of August, sunrise is at 5:35 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 7:15 pm EDT.
Sunshine
August has the most sunshine of the year, with an average of 10.8h of sunshine.UV index
July and August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 6 in August translates into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in August /
Average sunshine in August
South Yarmouth, 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 48min
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).
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).
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).
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).
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).
