August weather forecast
Bar Harbor, ME

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 August

August, the last month of the summer in Bar Harbor, is a moderately hot month, with an average temperature ranging between max 73.4°F (23°C) and min 57.7°F (14.3°C).

Temperature

August is the warmest month, with an average high-temperature of 73.4°F (23°C) and an average low-temperature of 57.7°F (14.3°C).

Humidity

In Bar Harbor, the average relative humidity in August is 80%.

Rainfall

In Bar Harbor, during 10.4 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, in Bar Harbor, there are 142.1 rainfall days, and 32.28" (820mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Bar Harbor.

Ocean temperature

With an average ocean temperature of 56.8°F (13.8°C), August is the month with the warmest seawater.
Note: Swimming in 56.8°F (13.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in August in Bar Harbor is 13h and 59min.
On the first day of August, sunrise is at 5:19 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 7:11 pm EDT.

Sunshine

August has the most sunshine of the year in Bar Harbor, with an average of 10.1h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 in August interpret into the following advice:
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 warmest month in Bar Harbor?

The warmest month is August, with an average high-temperature of 73.4°F (23°C) and an average low-temperature of 57.7°F (14.3°C).

What is the temperature in August in Bar Harbor?

In August, the average high-temperature is 73.4°F (23°C), and the average low-temperature is 57.7°F (14.3°C).

What is the average humidity in August in Bar Harbor?

In August, the average relative humidity is 80%.

How many days does it rain in August in Bar Harbor?

In Bar Harbor, Maine, during August, the rain falls for 10.4 days and regularly aggregates up to 1.73" (44mm) of precipitation.

When it does not snow in Bar Harbor?

In Bar Harbor, Maine, snow does not fall in June through September.

When is the ocean warmest in Bar Harbor?

August is the month with the warmest seawater, with an average ocean temperature of 56.8°F (13.8°C).

What is the ocean temperature in August in Bar Harbor?

In Bar Harbor, Maine, in August, the average water temperature is 56.8°F (13.8°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Bar Harbor have in August?

In Bar Harbor, Maine, the average day length in August is 13h and 59min.

What time are sunrise and sunset in August in Bar Harbor?

On the first day of August in Bar Harbor, sunrise is at 5:19 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 7:11 pm EDT.

What month has the most sunshine in Bar Harbor?

With an average of 10.1h of sunshine, August has the most sunshine of the year.

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

In Bar Harbor, the average sunshine duration in August is 10.1h.

What is the month with the highest UV index in Bar Harbor?

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

What is the UV index intensity in August in Bar Harbor?

In August, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat 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 August
Bar Harbor, ME

Average temperature in August - Bar Harbor, ME
  • Average high temperature in August: 73.4°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 August: 57.7°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).

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Average pressure in August
Bar Harbor, ME

Average pressure in August - Bar Harbor, ME
  • Average pressure in August: 29.96"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 August
Bar Harbor, ME

Average wind speed in August - Bar Harbor, ME
  • Average wind speed in August: 6.3mph

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).

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Average humidity in August
Bar Harbor, ME

Average humidity in August - Bar Harbor, ME
  • Average humidity in August: 80%

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

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Average rainfall in August
Bar Harbor, ME

Average rainfall in August - Bar Harbor, ME
  • Average rainfall in August: 1.73"

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

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Average rainfall days in August
Bar Harbor, ME

Average rainfall days in August - Bar Harbor, ME
  • Average rainfall days in August: 10.4 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).

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Average snowfall in August
Bar Harbor, ME

Average snowfall in August - Bar Harbor, ME
  • Average snowfall in August: 0"

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

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Average snowfall days in August
Bar Harbor, ME

Average snowfall days in August - Bar Harbor, ME
  • Average snowfall days in August: 0 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).

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Average sea temperature in August
Bar Harbor, ME

Average sea temperature in August - Bar Harbor, ME
  • Average sea temperature in August: 56.8°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).

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

Average daylight in August / Average sunshine in August - Bar Harbor, ME
  • Average daylight in August: 13h and 59min

The month with the longest days is June (Average daylight: 15h and 29min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in August: 10h and 6min

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).

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Average sunshine days in August
Bar Harbor, ME

Average sunshine days in August - Bar Harbor, ME
  • Average sunshine days in August: 18.7 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).

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Average UV index in August
Bar Harbor, ME

Average UV index in August - Bar Harbor, ME
  • Average UV index in August: 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 August
Bar Harbor, ME

Average cloud cover in August - Bar Harbor, ME
  • Average cloud cover in August: 35

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).

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Average visibility in August
Bar Harbor, ME

Average visibility in August - Bar Harbor, ME
  • Average visibility in August: 5mi

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).

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