July weather forecast
Barnstable, MA

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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

The transition from June to July in Barnstable brings a subtle temperature rise, with average high-temperatures increasing from a comfortable 64°F (17.8°C) to a pleasant 72.1°F (22.3°C). Barnstable's evenings during July maintain an average temperature of 67.3°F (19.6°C), aligning closely with the daytime temperatures.

Humidity

May through July, with an average relative humidity of 83%, are the most humid months in Barnstable.

Rainfall

In Barnstable, in July, it is raining for 12.9 days, with typically 1.1" (28mm) of accumulated precipitation. In Barnstable, during the entire year, the rain falls for 129.6 days and collects up to 13.94" (354mm) of precipitation.

Snowfall

May through November are months without snowfall in Barnstable.

Ocean temperature

In Barnstable, in July, the average water temperature is 65.8°F (18.8°C).
Note: Swimming is not a pleasurable activity for most people when the water temperature is 65.8°F (18.8°C). Breathing control gets harder as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).

Daylight

In July, the average length of the day in Barnstable is 14h and 51min.
On the first day of July in Barnstable, sunrise is at 5:10 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 7:59 pm EDT.

Sunshine

The average sunshine in July in Barnstable is 10.6h.

UV index

The months with the highest UV index in Barnstable are July and August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: An average UV index of 6 in July transforms into this advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

What is the usual temperature for Barnstable in July?

The high-temperature, in July, in Barnstable, is 72.1°F (22.3°C), while the low-temperature averages to 67.3°F (19.6°C).

What is the most humid month in Barnstable?

May through July, with an average relative humidity of 83%, are most humid months in Barnstable.

What is the average humidity in July in Barnstable?

In July, the average relative humidity is 83%.

How much does it rain in Barnstable in July?

In July, in Barnstable, the rain falls for 12.9 days. Throughout July, 1.1" (28mm) of precipitation is accumulated.

When it does not snow in Barnstable?

In Barnstable, Massachusetts, snow does not fall in May through November.

How cold is the water in July in Barnstable?

In July, the average ocean temperature is 65.8°F (18.8°C). For most, swimming in 65.8°F (18.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in July in Barnstable?

In Barnstable, the average day length in July is 14h and 51min.

When is the sunrise / sunset in July in Barnstable?

In July, on the first day of the month, sunrise is at 5:10 am and sunset at 8:19 pm. On the last day of the month, in Barnstable, Massachusetts, sunrise is at 5:35 am and sunset at 7:59 pm EDT.

How many hours of sunshine does Barnstable have in July?

In Barnstable, the average sunshine duration in July is 10.6h.

When is the highest UV index in Barnstable?

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

What is the UV index reading in July in Barnstable?

In Barnstable, Massachusetts, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
64°F 17.8°C
72.1°F 22.3°C
72.5°F 22.5°C
Average low temperature
59.4°F 15.2°C
67.3°F 19.6°C
68.2°F 20.1°C
Average pressure
29.93" 760mmHg
29.95" 761mmHg
29.98" 761mmHg
Average wind speed
11.2mph 18km/h
10.5mph 16.9km/h
10.4mph 16.7km/h
Average max. wind speed
11.9mph 19.2km/h
11.2mph 18km/h
11.1mph 17.9km/h
Average wind speed gusts
20.4mph 32.8km/h
18.8mph 30.3km/h
17.4mph 28km/h
Average humidity
83%
83%
81%
Average rainfall
1.1" 28mm
1.1" 28mm
0.94" 24mm
Average rainfall days
11.5
12.9
11.3
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
57.7°F 14.3°C
65.8°F 18.8°C
67.5°F 19.7°C
Average daylight
15h 1min
14h 5min
13h 5min
Average sunshine
9h 3min
10h 4min
10h 5min
Average sunshine days
16.6
16.7
17.8
Average UV index
5
6
6
Average cloud cover
36%
29%
27%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in July
Barnstable, MA

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).

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Average pressure in July
Barnstable, MA

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).

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Average wind speed in July
Barnstable, MA

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).

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Average humidity in July
Barnstable, MA

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%).

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Average rainfall in July
Barnstable, MA

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").

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Average rainfall days in July
Barnstable, MA

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).

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Average snowfall in July
Barnstable, MA

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").

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Average snowfall days in July
Barnstable, MA

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).

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Average sea temperature in July
Barnstable, MA

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).

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Average daylight in July /
Average sunshine in July
Barnstable, MA

Average daylight in July / Average sunshine in July - Barnstable, MA
  • Average daylight in July: 14h 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 July: 10h and 4min

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).

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Average sunshine days in July
Barnstable, MA

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).

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Average UV index in July
Barnstable, MA

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).

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Average cloud cover in July
Barnstable, MA

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).

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Average visibility in July
Barnstable, MA

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).

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Barnstable, Massachusetts, USA

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