May weather forecast
Bar Harbor, ME

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The popular tourist spot of Bar Harbor in Maine, within the Mount Desert Island
The popular tourist spot of Bar Harbor in Maine, within the Mount Desert Island

Weather in May

May marks the advent of warmer days in Bar Harbor. The month sees a trivial snowfall of 0.08" (2mm), a definite sign of impending summer. Frequent rain showers contribute to the greenery, making the city a vibrant treat for nature lovers. As sunlight stretches into the evenings, suitable weather prevails for outdoor explorations. May is an ideal time for outdoor activities and signifies the start of the prime tourist season in Bar Harbor.

Temperature

The average high-temperature increases in May, moving from a frosty 48.6°F (9.2°C) in April to a moderate 58.6°F (14.8°C). Bar Harbor, during May, witnesses an average low-temperature of 44.2°F (6.8°C).

Humidity

In Bar Harbor, the average relative humidity in May is 78%.

Rainfall

In Bar Harbor, in May, during 14.8 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Bar Harbor, during the entire year, the rain falls for 142.1 days and collects up to 32.28" (820mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Bar Harbor aggregates 0.08" (2mm) of snow. Throughout the year, there are 48.1 snowfall days, and 23.82" (605mm) of snow is accumulated.

Ocean temperature

In Bar Harbor, the average seawater temperature in May is 44.2°F (6.8°C).
Note: Danger awaits those who swim in 44.2°F (6.8°C) without protection. Falling below 50°F (10°C) means intense cold shock and hyperventilation.

Daylight

In May, the average length of the day is 14h and 49min.
On the first day of May, sunrise is at 5:22 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 4:51 am and sunset at 8:09 pm EDT.

Sunshine

In Bar Harbor, the average sunshine in May is 7.8h.

UV index

In Bar Harbor, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum high daily UV index of 4 during May translates into the following directions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.

Frequently asked questions

What is the average May temperature in Bar Harbor?

In Bar Harbor, 58.6°F (14.8°C) is the average high-temperature and 44.2°F (6.8°C) is the average low-temperature during May.

What is the average humidity in May?

The average relative humidity in May is 78%.

How much does it rain in May?

In Bar Harbor, in May, it is raining for 14.8 days, with typically 2.28" (58mm) of accumulated precipitation.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Bar Harbor aggregates 0.08" (2mm) of snow.

What is the ocean temperature in May?

In Bar Harbor, the average seawater temperature in May is 44.2°F (6.8°C). Swimming in 44.2°F (6.8°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 May?

In Bar Harbor, the average day length in May is 14h and 49min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 5:22 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 4:51 am and sunset at 8:09 pm EDT.

How many hours of sunshine does Bar Harbor have in May?

In May, the average sunshine duration is 7.8h.

How high is the UV index in May?

In May, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Bar Harbor, ME

Average temperature in May - Bar Harbor, ME
  • Average high temperature in May: 58.6°F

The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in May: 44.2°F

The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in May
Bar Harbor, ME

Average pressure in May - Bar Harbor, 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).

Average wind speed in May
Bar Harbor, ME

Average wind speed in May - Bar Harbor, ME
  • Average wind speed in May: 7.6mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

Average humidity in May
Bar Harbor, ME

Average humidity in May - Bar Harbor, ME
  • Average humidity in May: 78%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is November (76%).

Average rainfall in May
Bar Harbor, ME

Average rainfall in May - Bar Harbor, ME
  • Average rainfall in May: 2.28"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (1.57").

Average rainfall days in May
Bar Harbor, ME

Average rainfall days in May - Bar Harbor, ME
  • Average rainfall days in May: 14.8 days

The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is February (7.5 days).

Average snowfall in May
Bar Harbor, ME

Average snowfall in May - Bar Harbor, ME
  • Average snowfall in May: 0.08"

The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Bar Harbor, ME

Average snowfall days in May - Bar Harbor, ME
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in May
Bar Harbor, ME

Average sea temperature in May - Bar Harbor, ME
  • Average sea temperature in May: 44.3°F

The best month for swimming (with the highest average sea temperature) is August (56.8°F).
The coldest month (with the lowest average sea temperature) is March (38.6°F).

Average daylight in May /
Average sunshine in May
Bar Harbor, ME

Average daylight in May / Average sunshine in May - Bar Harbor, ME
  • Average daylight in May: 14h and 5min

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 May: 7h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).

Average sunshine days in May
Bar Harbor, ME

Average sunshine days in May - Bar Harbor, ME
  • Average sunshine days in May: 14.5 days

The month with the most sunshine days is August (18.7 days).
The month with the least sunshine days is April (11.2 days).

Average UV index in May
Bar Harbor, ME

Average UV index in May - Bar Harbor, 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).

Average cloud cover in May
Bar Harbor, ME

Average cloud cover in May - Bar Harbor, ME
  • Average cloud cover in May: 50

The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 35).

Average visibility in May
Bar Harbor, ME

Average visibility in May - Bar Harbor, ME
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).

Bar Harbor, Maine, USA

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