Deer Isle
Maine, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Deer Isle, ME

January, the same as December, in Deer Isle, Maine, is another subzero cold winter month, with average temperature fluctuating between 21°F (-6.1°C) and 31.5°F (-0.3°C). 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). Weather in January »

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

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

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

May, the last month of the spring, in Deer Isle, is a fresh month, with average temperature varying between 45.5°F (7.5°C) and 55°F (12.8°C). In May, the average high-temperature rises, from a frosty 46°F (7.8°C) in April, to a cool 55°F (12.8°C). Weather in May »

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

July in Deer Isle, Maine, is an agreeable summer month, with average temperature ranging between min 59.5°F (15.3°C) and max 68.7°F (20.4°C). In Deer Isle, the average high-temperature slightly increases, from an enjoyable 62.2°F (16.8°C) in June, to a pleasant 68.7°F (20.4°C). Weather in July »

August, the last month of the summer, in Deer Isle, is another pleasant month, with average temperature varying between 68.9°F (20.5°C) and 59.9°F (15.5°C). August is the warmest month, with an average high-temperature of 68.9°F (20.5°C) and an average low-temperature of 59.9°F (15.5°C). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Deer Isle, Maine, with average temperature ranging between max 63.9°F (17.7°C) and min 54.7°F (12.6°C). In Deer Isle, the average high-temperature is essentially the same as in August - a comfortable 63.9°F (17.7°C). Weather in September »

October, the same as September, is a cool autumn month in Deer Isle, Maine, with temperature in the range of an average low of 47.1°F (8.4°C) and an average high of 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 »

November, the last month of the autumn, in Deer Isle, is another chilly month, with average temperature fluctuating between 37.4°F (3°C) and 45.3°F (7.4°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 »

The first month of the winter, December, is still a cold month in Deer Isle, Maine, with average temperature fluctuating between 27.7°F (-2.4°C) and 36.7°F (2.6°C). In December, the average high-temperature marginally drops, from a frosty 45.3°F (7.4°C) in November, to a wintry 36.7°F (2.6°C). Weather in December »

What is the coldest month in Deer Isle?

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 in Deer Isle, Maine.

How much does it rain in Deer Isle?

Throughout the year, there are 115.5 rainfall days, and 17.95" (456mm) of precipitation is accumulated.

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, in Deer Isle, Maine, 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?

Months with the lowest UV index in Deer Isle, Maine, are January through March, November and December, with an average maximum UV index of 2.

When does it snow the most in Deer Isle?

The month with the most snowfall is February when snow falls for 6.6 days and typically aggregates up to 2.32" (59mm) of snow.

What is the month with the coldest ocean 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 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?

The month with the longest days in Deer Isle, Maine, is June, with an average of 15.5h of daylight.

What are the months with the highest UV index in Deer Isle?

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 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?

August is the warmest month in Deer Isle, 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?

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

What month has the most sunshine in Deer Isle?

The month with the most sunshine is August, with an average of 10.4h of sunshine.

What is the driest month in Deer Isle?

September is the month with the least rainfall in Deer Isle. Rain falls for 8.7 days and accumulates 0.91" (23mm) of precipitation.

What is the wettest month in Deer Isle?

October is the month with the most rainfall. Rain falls for 10.6 days and accumulates 2.09" (53mm) of precipitation.

What is the least humid month in Deer Isle?

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

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

With an average of 8.9h of daylight, December has the shortest days of the year in Deer Isle, Maine.

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

December has the least sunshine of the year in Deer Isle, with an average of 4.5h of sunshine.
Average temperature - Deer Isle, ME
Average rainfall - Deer Isle, ME

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

Average rainfall days - Deer Isle, ME

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

Average snowfall - Deer Isle, ME
Average snowfall days - Deer Isle, ME

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

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).

Average daylight / Average sunshine - Deer Isle, ME
Average UV index - Deer Isle, ME