May weather forecast
Deer Isle, ME

Weather in May

May, the last month of the spring in Deer Isle, is a cool month, with temperature in the range of an average high of 55°F (12.8°C) and an average low of 45.5°F (7.5°C).

Temperature

In Deer Isle, the average high-temperature in May increases from a frosty 46°F (7.8°C) in April to a cool 55°F (12.8°C). The average low-temperature, in May, is 45.5°F (7.5°C).

Humidity

In May, the average relative humidity in Deer Isle is 82%.

Rainfall

In Deer Isle, during 12 rainfall days, 1.34" (34mm) of precipitation is typically 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 through September.

Ocean temperature

In Deer Isle, the average water temperature is 44.4°F (6.9°C).
Note: Swimming in 44.4°F (6.9°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.

Daylight

In May, the average length of the day in Deer Isle is 14h and 47min.
On the first day of May in Deer Isle, sunrise is at 5:25 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 4:54 am and sunset at 8:10 pm EDT.

Sunshine

In Deer Isle, the average sunshine in May is 8.1h.

UV index

In Deer Isle, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 in May transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in May in Deer Isle?

In Deer Isle, Maine, in May, the average high-temperature is 55°F (12.8°C), and the average low-temperature is 45.5°F (7.5°C).

What is the average humidity in May in Deer Isle?

In Deer Isle, Maine, the average relative humidity in May is 82%.

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

In May, in Deer Isle, the rain falls for 12 days. Throughout May, 1.34" (34mm) of precipitation is accumulated.

When it does not snow in Deer Isle?

May through September are months without snowfall in Deer Isle.

Does it snow in Deer Isle in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the water temperature in May in Deer Isle?

In Deer Isle, Maine, the average seawater temperature in May is 44.4°F (6.9°C). Swimming in 44.4°F (6.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Deer Isle have in May?

The average day length in May in Deer Isle is 14h and 47min.

When are sunrise and sunset in May in Deer Isle?

In May, on the first day of the month, sunrise is at 5:25 am and sunset at 7:38 pm. On the last day of the month, in Deer Isle, sunrise is at 4:54 am and sunset at 8:10 pm EDT.

How long on average sun shines in May in Deer Isle?

In May, the average sunshine duration in Deer Isle is 8.1h.

What is the UV index intensity in May in Deer Isle?

In May, the average daily maximum UV index in Deer Isle, Maine, is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Deer Isle, ME

Average temperature in May - Deer Isle, ME
  • Average high temperature in May: 55°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 May: 45.5°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 May
Deer Isle, ME

Average pressure in May - Deer Isle, ME
  • Average pressure in May: 29.99"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 May
Deer Isle, ME

Average wind speed in May - Deer Isle, ME
  • Average wind speed in May: 9.6mph

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 May
Deer Isle, ME

Average humidity in May - Deer Isle, ME
  • Average humidity in May: 82%

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 May
Deer Isle, ME

Average rainfall in May - Deer Isle, ME
  • Average rainfall in May: 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 May
Deer Isle, ME

Average rainfall days in May - Deer Isle, ME
  • Average rainfall days in May: 12 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 May
Deer Isle, ME

Average snowfall in May - Deer Isle, ME
  • Average snowfall in May: 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 May
Deer Isle, ME

Average snowfall days in May - Deer Isle, ME
  • Average snowfall days in May: 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 May
Deer Isle, ME

Average sea temperature in May - Deer Isle, ME
  • Average sea temperature in May: 44.5°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 May /
Average sunshine in May
Deer Isle, ME

Average daylight in May / Average sunshine in May - Deer Isle, ME
  • Average daylight in May: 14h and 47min

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).

  • Average sunshine in May: 8h and 6min

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 May
Deer Isle, ME

Average sunshine days in May - Deer Isle, ME
  • Average sunshine days in May: 16.3 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 May
Deer Isle, ME

Average UV index in May - Deer Isle, ME
  • Average UV index in May: 4

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 May
Deer Isle, ME

Average cloud cover in May - Deer Isle, ME
  • Average cloud cover in May: 47

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 May
Deer Isle, ME

Average visibility in May - Deer Isle, ME
  • Average visibility in May: 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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