August weather forecast
Belfast, ME

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Weather in August

As summer's end draws near in Belfast, August brings slight changes in the weather conditions. Unlike July, average temperatures tend to take a slight dip, indicating autumn's impending arrival. Interestingly, snowfall remains non-existent, maintaining the norm of a snow-free summer season. Outdoor activities continue to dominate the local scene, with ample sunshine hours encouraging locals and visitors alike to enjoy the outdoors. August is seen as a transitional period, saying goodbye to summer and welcoming the refreshing start of autumn.

Temperature

The months of July and August bring the highest temperatures in Belfast, averaging a high of 73.9°F (23.3°C).

Humidity

The average relative humidity in August in Belfast is 82%.

Rainfall

In Belfast, during August, the rain falls for 13 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, in Belfast, there are 141.1 rainfall days, and 24.29" (617mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 60.4°F (15.8°C).
Note: The enjoyment of swimming decreases for most when the surface water temperature is 60.4°F (15.8°C). Breathing control becomes increasingly challenging as temperatures descend below 69.8°F (21°C).

Daylight

In Belfast, the average length of the day in August is 13h and 59min.
On the first day of the month, sunrise is at 5:23 am and sunset at 8:00 pm. On the last day of August, sunrise is at 5:58 am and sunset at 7:13 pm EDT.

Sunshine

August has the most sunshine of the year in Belfast, with an average of 9.9h of sunshine.

UV index

June through August, with an average maximum UV index of 5, are months with the highest UV index in Belfast, Maine. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 5 during August translates into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What is the hottest time of year in Belfast?

July and August represent the warmest period, with an average high-temperature of 73.9°F (23.3°C).

What is the average August temperature in Belfast?

The high-temperature, in August, in Belfast, is 73.9°F (23.3°C), while the low-temperature averages to 56.8°F (13.8°C).

What is the average humidity in August in Belfast?

The average relative humidity in August in Belfast is 82%.

How much does it rain in Belfast in August?

In Belfast, during August, the rain falls for 13 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When it does not snow in Belfast?

June through September are months without snowfall in Belfast, Maine.

What is the month with the warmest ocean in Belfast?

With an average ocean temperature of 60.4°F (15.8°C), August is the month with the warmest seawater in Belfast, Maine.

What is the ocean temperature in August in Belfast?

In Belfast, the average seawater temperature in August is 60.4°F (15.8°C). Swimming in 60.4°F (15.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Belfast have in August?

In Belfast, the average day length in August is 13h and 59min.

What time are sunrise and sunset in August in Belfast?

In August, on the first day of the month, sunrise is at 5:23 am and sunset at 8:00 pm. On the last day of the month, in Belfast, Maine, sunrise is at 5:58 am and sunset at 7:13 pm EDT.

What month has the most sunshine in Belfast?

August has the most sunshine of the year, with an average of 9.9h of sunshine.

How many hours of sunshine does Belfast have in August?

The average sunshine duration in August is 9.9h.

What is the month with the highest UV index in Belfast?

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

How high is the UV index in August in Belfast?

In August, the average daily maximum UV index in Belfast, Maine, is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Belfast, ME

Average temperature in August - Belfast, ME
  • Average high temperature in August: 73.9°F

The warmest months (with the highest average high temperature) are July and August (73.9°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in August: 56.8°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

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Average pressure in August
Belfast, ME

Average pressure in August - Belfast, 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
Belfast, ME

Average wind speed in August - Belfast, ME
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in August
Belfast, ME

Average humidity in August - Belfast, ME
  • Average humidity in August: 82%

The months with the highest relative humidity are February and July (83%).
The month with the lowest relative humidity is November (77%).

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Average rainfall in August
Belfast, ME

Average rainfall in August - Belfast, ME
  • Average rainfall in August: 1.85"

The wettest month (with the highest rainfall) is December (2.72").
The driest months (with the least rainfall) are July and September (1.46").

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Average rainfall days in August
Belfast, ME

Average rainfall days in August - Belfast, ME
  • Average rainfall days in August: 13 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.1 days).

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Average snowfall in August
Belfast, ME

Average snowfall in August - Belfast, ME
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Belfast, ME

Average snowfall days in August - Belfast, ME
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (10.1 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
Belfast, ME

Average sea temperature in August - Belfast, ME
  • Average sea temperature in August: 60.4°F

The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).

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Average daylight in August /
Average sunshine in August
Belfast, ME

Average daylight in August / Average sunshine in August - Belfast, ME
  • Average daylight in August: 14h and 0min

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 August: 9h and 5min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in August
Belfast, ME

Average sunshine days in August - Belfast, ME
  • Average sunshine days in August: 15.8 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.7 days).

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Average UV index in August
Belfast, ME

Average UV index in August - Belfast, 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
Belfast, ME

Average cloud cover in August - Belfast, ME
  • Average cloud cover in August: 37

The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 37).

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Average visibility in August
Belfast, ME

Average visibility in August - Belfast, ME
  • Average visibility in August: 5mi

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

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Belfast, Maine, USA

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