July weather forecastSouth Yarmouth, MA
July
Weather in July
July is a pleasant summer month in South Yarmouth, Massachusetts, with an average temperature ranging between max 71.6°F (22°C) and min 67.6°F (19.8°C).Temperature
In July, the meteorological conditions subtly change with the average high-temperature edging from a comfortable 63.5°F (17.5°C) in June to an agreeable 71.6°F (22°C). Night temperatures during July experience a slight downturn, averaging a comfortable 67.6°F (19.8°C).Humidity
June and July, with an average relative humidity of 84%, are the most humid months in South Yarmouth.Rainfall
In South Yarmouth, during July, the rain falls for 12.3 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, there are 129 rainfall days, and 14.21" (361mm) of precipitation is accumulated.Snowfall
In South Yarmouth, snow does not fall in May through November.Ocean temperature
In South Yarmouth, the average seawater temperature in July is 65.8°F (18.8°C).Note: In 65.8°F (18.8°C), swimming is not an enjoyable activity for most. The challenge of managing one's breathing increases as the temperature goes under 69.8°F (21°C).
Daylight
The average length of the day in July is 14h and 51min.On the first day of July, sunrise is at 5:10 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 7:59 pm EDT.
Sunshine
In July, the average sunshine is 10.5h.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 threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 6 during July translates into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
South Yarmouth, MA
- Average high temperature in July: 71.6°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 July: 67.6°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 July
South Yarmouth, MA
- Average pressure in July: 29.96"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 July
South Yarmouth, MA
- Average wind speed in July: 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 July
South Yarmouth, MA
- Average humidity in July: 84%
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 July
South Yarmouth, MA
- Average rainfall in July: 1.02"
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 July
South Yarmouth, MA
- Average rainfall days in July: 12.3 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 July
South Yarmouth, MA
- Average snowfall in July: 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 July
South Yarmouth, MA
- Average snowfall days in July: 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 July
South Yarmouth, MA
- Average sea temperature in July: 65.8°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 July /
Average sunshine in July
South Yarmouth, MA
- Average daylight in July: 14h 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 July: 10h and 30min
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 July
South Yarmouth, MA
- Average sunshine days in July: 17.6 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 July
South Yarmouth, MA
- Average UV index in July: 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 July
South Yarmouth, MA
- Average cloud cover in July: 29
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 July
South Yarmouth, MA
- Average visibility in July: 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).
