July weather forecast
Plymouth, MA

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The white colonial houses in Plymouth, Massachusetts, with the US flag flying
The white colonial houses in Plymouth, Massachusetts, with the US flag flying

Weather in July

Joining the summer bandwagon, July in Plymouth, Massachusetts, boasts the highest temperatures, fewer clouds, and bustling beaches. With its characteristic summer hotness, July's weather stands synonymous with beach vacations, sea-surfing, and uninterrupted outdoor leisure. Aligning with the trend, July hits the maximum temperature of 77.5°F (25.3°C), much to the delight of sun-seekers. With the city in its summer prime, July beckons tourists worldwide to take advantage of Plymouth's sunny harbor, historic sites, and lively weather. As the mercury soars in July, so does the excitement, attributing to the city's summer allure.

Temperature

Temperature records in Plymouth mark July as the warmest month, with highs averaging 77.5°F (25.3°C) and lows at 65.8°F (18.8°C).

Humidity

July is the most humid month in Plymouth, with an average relative humidity of 80%.

Rainfall

The wettest months in Plymouth are July and October, with an average 1.65" (42mm) of rainfall.

Snowfall

May through October are months without snowfall.

Ocean temperature

In July, the average ocean temperature in Plymouth is 66.2°F (19°C).
Note: For the majority of people, swimming in water at 66.2°F (19°C) is not enjoyable. The challenge of controlling breathing escalates as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In July, the average length of the day is 14h and 53min.
On the first day of the month, sunrise is at 5:11 am and sunset at 8:21 pm. On the last day of July, in Plymouth, Massachusetts, sunrise is at 5:36 am and sunset at 8:02 pm EDT.

Sunshine

In July, the average sunshine in Plymouth is 10.3h.

UV index

The months with the highest UV index in Plymouth are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index, 6 during July, leads to the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What are the warmest months in Plymouth?

In Plymouth, the average temperatures in July are the highest, with a peak at 77.5°F (25.3°C) and a low of 65.8°F (18.8°C).

What are the temperatures in Plymouth in July?

In Plymouth, 77.5°F (25.3°C) is the average high-temperature and 65.8°F (18.8°C) is the average low-temperature during July.

What is the most humid month in Plymouth?

The most humid month in Plymouth, Massachusetts, is July, with an average relative humidity of 80%.

What is the average humidity in July in Plymouth?

In Plymouth, the average relative humidity in July is 80%.

What is the wettest month in Plymouth?

The wettest months in Plymouth are July and October, with an average 1.65" (42mm) of rainfall.

How much does it rain in Plymouth in July?

In Plymouth, in July, during 14 rainfall days, 1.65" (42mm) of precipitation is typically accumulated.

When it does not snow in Plymouth?

May through October are months without snowfall in Plymouth, Massachusetts.

How cold is the water in July in Plymouth?

In Plymouth, Massachusetts, in July, the average water temperature is 66.2°F (19°C). Swimming in 66.2°F (19°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

The average day length in July in Plymouth is 14h and 53min.

What time are sunrise and sunset in July in Plymouth?

In July, on the first day of the month, sunrise is at 5:11 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:02 pm EDT.

How long on average sun shines in July in Plymouth?

The average sunshine duration in July in Plymouth is 10.3h.

What is the month with the highest UV index in Plymouth?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in July in Plymouth?

In Plymouth, Massachusetts, the average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Plymouth, MA

Average temperature in July - Plymouth, MA
  • Average high temperature in July: 77.5°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 July: 65.8°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).

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Average pressure in July
Plymouth, MA

Average pressure in July - Plymouth, 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
Plymouth, MA

Average wind speed in July - Plymouth, MA
  • Average wind speed in July: 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).

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Average humidity in July
Plymouth, MA

Average humidity in July - Plymouth, MA
  • Average humidity in July: 80%

The month with the highest relative humidity is July (80%).
The months with the lowest relative humidity are March, April and November (74%).

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Average rainfall in July
Plymouth, MA

Average rainfall in July - Plymouth, MA
  • Average rainfall in July: 1.65"

The wettest months (with the highest rainfall) are July and October (1.65").
The driest month (with the least rainfall) is February (1.02").

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Average rainfall days in July
Plymouth, MA

Average rainfall days in July - Plymouth, MA
  • Average rainfall days in July: 14 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).

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Average snowfall in July
Plymouth, MA

Average snowfall in July - Plymouth, MA
  • Average snowfall in July: 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").

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Average snowfall days in July
Plymouth, MA

Average snowfall days in July - Plymouth, MA
  • Average snowfall days in July: 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).

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Average sea temperature in July
Plymouth, MA

Average sea temperature in July - Plymouth, MA
  • Average sea temperature in July: 66.2°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).

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

Average daylight in July / Average sunshine in July - Plymouth, 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 2min

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).

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Average sunshine days in July
Plymouth, MA

Average sunshine days in July - Plymouth, MA
  • Average sunshine days in July: 14.8 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).

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Average UV index in July
Plymouth, MA

Average UV index in July - Plymouth, MA
  • Average UV index in July: 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).

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Average cloud cover in July
Plymouth, MA

Average cloud cover in July - Plymouth, MA
  • Average cloud cover in July: 32

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in July
Plymouth, MA

Average visibility in July - Plymouth, 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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Plymouth, Massachusetts, USA

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