July weather forecastBarnstable, MA
July
Weather in July
July is the warmest month in Barnstable, with temperature levels peaking at an average high of 72.1°F (22.3°C), highlighting the mid-summer climate. Long, sunny days and blue skies are a hallmark of this time of year. The incoming tide of salty sea-breeze carries welcome respite from the midday summer sun. The steady increase in sea temperatures invites swimmers and surfers to live their seaside dreams. Sunset watching becomes a common pastime, as residents savor the extended daylight.Temperature
July's arrival is noted with a slight increase in the average high-temperature, moving from an enjoyable 64°F (17.8°C) in June to a pleasant 72.1°F (22.3°C). July introduces a small decrease to a nighttime average of 67.3°F (19.6°C).Humidity
May through July, with an average relative humidity of 83%, are the most humid months.Rainfall
In Barnstable, Massachusetts, in July, during 12.9 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Barnstable, Massachusetts, during the entire year, the rain falls for 129.6 days and collects up to 13.94" (354mm) of precipitation.Snowfall
In Barnstable, Massachusetts, snow does not fall in May through November.Ocean temperature
In July, the average ocean temperature is 65.8°F (18.8°C).Note: Most people do not find pleasure in swimming when the water temperature is 65.8°F (18.8°C). Breathing becomes increasingly difficult to manage as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Barnstable, the average length of the day in July is 14h and 51min.On the first day of the month, sunrise is at 5:10 am and sunset at 8:19 pm. On the last day of July, sunrise is at 5:35 am and sunset at 7:59 pm EDT.
Sunshine
In Barnstable, the average sunshine in July is 10.6h.UV index
July and 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 health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in July converts into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Barnstable, MA
- Average high temperature in July: 72.1°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in July: 67.3°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in July
Barnstable, MA
- Average pressure in July: 29.95"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
Barnstable, MA
- Average wind speed in July: 10.5mph
The windiest month (with the highest average wind speed) is January (16.4mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in July
Barnstable, MA
- Average humidity in July: 83%
The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall in July
Barnstable, MA
- Average rainfall in July: 1.1"
The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days in July
Barnstable, MA
- Average rainfall days in July: 12.9 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in July
Barnstable, MA
- Average snowfall in July: 0"
The months with the highest snowfall are January and February (0.63").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in July
Barnstable, MA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in July
Barnstable, 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
Barnstable, 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 36min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in July
Barnstable, MA
- Average sunshine days in July: 16.7 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is February (14.8 days).
Average UV index in July
Barnstable, 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
Barnstable, MA
- Average cloud cover in July: 29
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in July
Barnstable, 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).
