July weather forecast
Deer Isle, ME

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Weather in July

July is characterized by the most robust appearance of summer in Deer Isle, Maine. The high average temperature soars to 68.7°F (20.4°C), making July the hottest month of the year. On top of warm temperatures, there are significantly longer daylight hours, increasing outdoor activities. Despite the high temperatures, coastal breezes from nearby bodies of water provide some relief. It's characterized by outdoor festivals and activities as people enjoy the sun in all its summer glory.

Temperature

In July, the meteorological conditions in Deer Isle subtly change with the average high-temperature edging from a comfortable 62.2°F (16.8°C) in June to an agreeable 68.7°F (20.4°C). Deer Isle experiences an average temperature drop to a mild 59.5°F (15.3°C) during July nights.

Humidity

July is the most humid month, with an average relative humidity of 85%.

Rainfall

In July, in Deer Isle, the rain falls for 12.8 days. Throughout July, 1.34" (34mm) of precipitation is accumulated. Throughout the year, in Deer Isle, there are 115.5 rainfall days, and 17.95" (456mm) of precipitation is accumulated.

Snowfall

In Deer Isle, snow does not fall in May through September.

Ocean temperature

In Deer Isle, the average seawater temperature in July is 56.8°F (13.8°C).
Note: In 56.8°F (13.8°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.

Daylight

The average length of the day in July is 15h and 7min.
On the first day of the month, sunrise is at 4:55 am and sunset at 8:22 pm. On the last day of July, sunrise is at 5:22 am and sunset at 8:00 pm EDT.

Sunshine

The average sunshine in July is 9.9h.

UV index

The months with the highest UV index in Deer Isle are June through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 5 in July interprets into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

What are July temperatures in Deer Isle?

The average high-temperature and low-temperature in Deer Isle during July are 68.7°F (20.4°C) and 59.5°F (15.3°C) respectively.

What is the most humid month in Deer Isle?

The most humid month in Deer Isle, Maine, is July, with an average relative humidity of 85%.

What is the average humidity in July in Deer Isle?

The average relative humidity in July is 85%.

How many days does it rain in July in Deer Isle?

In Deer Isle, in July, during 12.8 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

When it does not snow in Deer Isle?

In Deer Isle, snow does not fall in May through September.

How cold is the water in July in Deer Isle?

In Deer Isle, Maine, in July, the average water temperature is 56.8°F (13.8°C). Swimming in 56.8°F (13.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in July in Deer Isle?

In Deer Isle, Maine, the average day length in July is 15h and 7min.

What time are sunrise and sunset in July in Deer Isle?

In July, on the first day of the month, sunrise is at 4:55 am and sunset at 8:22 pm. On the last day of the month, in Deer Isle, sunrise is at 5:22 am and sunset at 8:00 pm EDT.

How many hours of sunshine does Deer Isle have in July?

In Deer Isle, Maine, the average sunshine duration in July is 9.9h.

What is the month with the highest UV index in Deer Isle?

The months with the highest UV index in Deer Isle, Maine, are June through August, with an average maximum UV index of 5.

What is the UV index reading in July in Deer Isle?

In July, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
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
Deer Isle, ME

Average temperature in July - Deer Isle, ME
  • Average high temperature in July: 68.7°F

The warmest month (with the highest average high temperature) is August (68.9°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in July: 59.5°F

The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in July
Deer Isle, ME

Average pressure in July - Deer Isle, ME
  • Average pressure in July: 29.93"Hg

The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in July
Deer Isle, ME

Average wind speed in July - Deer Isle, ME
  • Average wind speed in July: 7.8mph

The windiest month (with the highest average wind speed) is January (14.4mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in July
Deer Isle, ME

Average humidity in July - Deer Isle, ME
  • Average humidity in July: 85%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (76%).

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Average rainfall in July
Deer Isle, ME

Average rainfall in July - Deer Isle, ME
  • Average rainfall in July: 1.34"

The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is September (0.91").

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Average rainfall days in July
Deer Isle, ME

Average rainfall days in July - Deer Isle, ME
  • Average rainfall days in July: 12.8 days

The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (5.3 days).

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Average snowfall in July
Deer Isle, ME

Average snowfall in July - Deer Isle, ME
  • Average snowfall in July: 0"

The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in July
Deer Isle, ME

Average snowfall days in July - Deer Isle, ME
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in July
Deer Isle, ME

Average sea temperature in July - Deer Isle, ME
  • Average sea temperature in July: 56.7°F

The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).

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Average daylight in July /
Average sunshine in July
Deer Isle, ME

Average daylight in July / Average sunshine in July - Deer Isle, ME
  • Average daylight in July: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in July: 9h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).

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Average sunshine days in July
Deer Isle, ME

Average sunshine days in July - Deer Isle, ME
  • Average sunshine days in July: 15.4 days

The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is July (15.4 days).

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Average UV index in July
Deer Isle, ME

Average UV index in July - Deer Isle, ME
  • Average UV index in July: 5

The months with the highest UV index are June, July and August (UV index 5).
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
Deer Isle, ME

Average cloud cover in July - Deer Isle, ME
  • Average cloud cover in July: 36

The months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in July
Deer Isle, ME

Average visibility in July - Deer Isle, ME
  • 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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Deer Isle, Maine, USA

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