Climate and monthly weather forecast
Deer Isle, ME

Weather in January

January, like December, is a freezing cold winter month in Deer Isle, Maine, with an average temperature varying between 31.5°F (-0.3°C) and 21°F (-6.1°C). With an average high-temperature of 31.5°F (-0.3°C) and an average low-temperature of 21°F (-6.1°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Deer Isle, is a wintry month, with an average temperature fluctuating between 32.4°F (0.2°C) and 22.1°F (-5.5°C). In February, the average high-temperature is essentially the same as in January - a wintry 32.4°F (0.2°C). Weather in February »

Weather in March

March, the first month of the spring in Deer Isle, is also a wintry month, with temperature in the range of an average low of 27.9°F (-2.3°C) and an average high of 37°F (2.8°C). In March, the average high-temperature is relatively the same as in February - a still cold 37°F (2.8°C). Weather in March »

Weather in April

April in Deer Isle, Maine, is a frosty spring month, with an average temperature varying between 37.2°F (2.9°C) and 46°F (7.8°C). In Deer Isle, the average high-temperature in April increases from a cold 37°F (2.8°C) in March to a frosty 46°F (7.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a fresh month in Deer Isle, Maine, with an average temperature fluctuating between 45.5°F (7.5°C) and 55°F (12.8°C). In Deer Isle, Maine, the average high-temperature in May increases from a chilly 46°F (7.8°C) in April to a fresh 55°F (12.8°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Deer Isle, Maine, with an average temperature ranging between min 53.1°F (11.7°C) and max 62.2°F (16.8°C). In June, the average high-temperature marginally rises from a fresh 55°F (12.8°C) in May to an enjoyable 62.2°F (16.8°C). Weather in June »

Weather in July

July is an agreeable summer month in Deer Isle, Maine, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 68.7°F (20.4°C). In July, the average high-temperature marginally rises from an enjoyable 62.2°F (16.8°C) in June to a pleasant 68.7°F (20.4°C). Weather in July »

Weather in August

The last month of the summer, August, is also an agreeable month in Deer Isle, Maine, with an average temperature fluctuating between 59.9°F (15.5°C) and 68.9°F (20.5°C). With an average high-temperature of 68.9°F (20.5°C) and an average low-temperature of 59.9°F (15.5°C), August is the warmest month. Weather in August »

Weather in September

September, the first month of the autumn in Deer Isle, is still a comfortable month, with an average temperature fluctuating between 63.9°F (17.7°C) and 54.7°F (12.6°C). In September, the average high-temperature is almost the same as in August - an enjoyable 63.9°F (17.7°C). Weather in September »

Weather in October

October, like September, in Deer Isle, Maine, is another fresh autumn month, with an average temperature varying between 47.1°F (8.4°C) and 54.9°F (12.7°C). In October, the average high-temperature drops from a comfortable 63.9°F (17.7°C) in September to a fresh 54.9°F (12.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Deer Isle, is another chilly month, with an average temperature ranging between max 45.3°F (7.4°C) and min 37.4°F (3°C). In November, the average high-temperature drops from a cool 54.9°F (12.7°C) in October to a frosty 45.3°F (7.4°C). Weather in November »

Weather in December

December, the first month of the winter in Deer Isle, is also a wintry month, with an average temperature fluctuating between 27.7°F (-2.4°C) and 36.7°F (2.6°C). In Deer Isle, the average high-temperature in December slightly decreases from a chilly 45.3°F (7.4°C) in November to a wintry 36.7°F (2.6°C). Weather in December »
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FAQ

What is the coldest month in Deer Isle?

The coldest month is January, with an average high-temperature of 31.5°F (-0.3°C) and an average low-temperature of 21°F (-6.1°C).

How much does it rain in Deer Isle?

In Deer Isle, during the entire year, the rain falls for 115.5 days and collects up to 17.95" (456mm) of precipitation.

When does it snow in Deer Isle?

January through April, October through December are months with snowfall in Deer Isle.

How many days does it snow in Deer Isle?

Throughout the year, there are 29.2 snowfall days, and 9.65" (245mm) of snow is accumulated.

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

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most in Deer Isle?

February is the month with the most snowfall. Snow falls for 6.6 days and accumulates 2.32" (59mm) of snow.

When is the ocean coldest in Deer Isle?

March is the month with the coldest seawater in Deer Isle, with an average ocean temperature of 38.3°F (3.5°C).

When is Daylight Saving Time (DST) in Deer Isle?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Deer Isle, Maine, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Deer Isle?

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

When are the longest days in Deer Isle?

June has the longest days of the year in Deer Isle, with an average of 15h and 28min of daylight.

When is the highest UV index in Deer Isle?

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

What is the most humid month in Deer Isle?

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

What is the warmest month in Deer Isle?

The warmest month is August, with an average high-temperature of 68.9°F (20.5°C) and an average low-temperature of 59.9°F (15.5°C).

When is the ocean warmest in Deer Isle?

August is the month with the warmest seawater in Deer Isle, with an average ocean temperature of 58.6°F (14.8°C).

What month has the most sunshine in Deer Isle?

With an average of 10.4h of sunshine, August has the most sunshine of the year in Deer Isle, Maine.

What is the driest month in Deer Isle?

The month with the least rainfall in Deer Isle is September, when the rain falls for 8.7 days and typically collects 0.91" (23mm) of precipitation.

What is the rainiest month in Deer Isle?

The month with the most rainfall in Deer Isle, Maine, is October, when the rain falls for 10.6 days and typically aggregates up to 2.09" (53mm) of precipitation.

What is the least humid month in Deer Isle?

November is the least humid month, with an average relative humidity of 76%.

What is the month with the shortest days in Deer Isle?

December has the shortest days of the year in Deer Isle, Maine, with an average of 8h and 56min of daylight.

What is the month with the least sunshine in Deer Isle?

December has the least sunshine of the year, with an average of 4.5h of sunshine.

Average temperature
Deer Isle, ME

Average temperature - Deer Isle, ME

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).

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
Deer Isle, ME

Average pressure - Deer Isle, ME

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
Deer Isle, ME

Average wind speed - Deer Isle, ME

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 rainfall
Deer Isle, ME

Average rainfall - Deer Isle, ME

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
Deer Isle, ME

Average rainfall days - Deer Isle, ME

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
Deer Isle, ME

Average snowfall - Deer Isle, ME

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
Deer Isle, ME

Average snowfall days - Deer Isle, ME

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
Deer Isle, ME

Average sea temperature - Deer Isle, ME

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 / Average sunshine
Deer Isle, ME

Average daylight / Average sunshine - Deer Isle, ME

The month with the longest days is June (Average daylight: 15h and 28min).
The month with the shortest days is December (Average daylight: 8h and 56min).

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
Deer Isle, ME

Average sunshine days - Deer Isle, ME

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
Deer Isle, ME

Average UV index - Deer Isle, ME

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 visibility
Deer Isle, ME

Average visibility - Deer Isle, ME

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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