Climate and monthly weather forecast
Belfast, ME

Weather in January

January, like December, is another subzero cold winter month in Belfast, Maine, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 28.4°F (-2°C). The coldest month is January, with an average high-temperature of 28.4°F (-2°C) and an average low-temperature of 16.2°F (-8.8°C). Weather in January »

Weather in February

February, the last month of the winter in Belfast, is another freezing cold month, with an average temperature fluctuating between 17.4°F (-8.1°C) and 29.8°F (-1.2°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 29.8°F (-1.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Belfast, Maine, with an average temperature fluctuating between 24.3°F (-4.3°C) and 37°F (2.8°C). In Belfast, the average high-temperature in March slightly increases from a subzero cold 29.8°F (-1.2°C) in February to a cold 37°F (2.8°C). Weather in March »

Weather in April

April is a chilly spring month in Belfast, Maine, with an average temperature varying between 48.9°F (9.4°C) and 34.5°F (1.4°C). In Belfast, Maine, the average high-temperature in April rises from a cold 37°F (2.8°C) in March to a frosty 48.9°F (9.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a mild month in Belfast, Maine, with temperature in the range of an average low of 43.9°F (6.6°C) and an average high of 59.7°F (15.4°C). In May, the average high-temperature rises from a chilly 48.9°F (9.4°C) in April to a moderate 59.7°F (15.4°C). Weather in May »

Weather in June

June, the first month of the summer in Belfast, is a comfortable month, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 66.7°F (19.3°C). In Belfast, the average high-temperature in June slightly increases from a mild 59.7°F (15.4°C) in May to a comfortable 66.7°F (19.3°C). Weather in June »

Weather in July

July in Belfast, Maine, is a moderately hot summer month, with an average temperature fluctuating between 73.9°F (23.3°C) and 57.7°F (14.3°C). July and August, with an average high-temperature of 73.9°F (23.3°C), are the warmest months. Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Belfast, Maine, with temperature in the range of an average low of 56.8°F (13.8°C) and an average high of 73.9°F (23.3°C). July and August, with an average high-temperature of 73.9°F (23.3°C), are the warmest months. Weather in August »

Weather in September

September, the first month of the autumn in Belfast, is also an enjoyable month, with an average temperature varying between 67.1°F (19.5°C) and 51.1°F (10.6°C). In Belfast, Maine, the average high-temperature in September marginally drops from a moderately hot 73.9°F (23.3°C) in August to a comfortable 67.1°F (19.5°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Belfast, Maine, with an average temperature ranging between max 55.8°F (13.2°C) and min 43.2°F (6.2°C). In Belfast, the average high-temperature in October drops from a comfortable 67.1°F (19.5°C) in September to a mild 55.8°F (13.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Belfast, is also a frosty month, with an average temperature fluctuating between 44.1°F (6.7°C) and 32.7°F (0.4°C). In Belfast, the average high-temperature in November drops from a mild 55.8°F (13.2°C) in October to a frosty 44.1°F (6.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Belfast, Maine, with an average temperature fluctuating between 24.1°F (-4.4°C) and 34.2°F (1.2°C). In December, the average high-temperature decreases from a chilly 44.1°F (6.7°C) in November to a wintry 34.2°F (1.2°C). Weather in December »
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FAQ

What is the coldest month in Belfast?

January is the coldest month in Belfast, with an average high-temperature of 28.4°F (-2°C) and an average low-temperature of 16.2°F (-8.8°C).

How much does it rain in Belfast?

Throughout the year, in Belfast, Maine, there are 141.1 rainfall days, and 24.29" (617mm) of precipitation is accumulated.

When does it snow in Belfast?

Months with snowfall are January through May, October through December.

What is the snowiest month in Belfast?

January is the month with the most snowfall in Belfast, Maine. Snow falls for 10.1 days and accumulates 4.57" (116mm) of snow.

How many days does it snow in Belfast?

Throughout the year, in Belfast, there are 44.3 snowfall days, and 16.81" (427mm) of snow is accumulated.

When is the lowest UV index in Belfast?

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

What is the most humid month in Belfast?

February and July, with an average relative humidity of 83%, are most humid months in Belfast, Maine.

What is the month with the least sunshine in Belfast?

With an average of 4.3h of sunshine, February has the least sunshine of the year in Belfast, Maine.

What is the month with the coldest ocean in Belfast?

The month with the coldest seawater is March, with an average ocean temperature of 37.9°F (3.3°C).

When is Daylight Saving Time (DST) in Belfast?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Belfast, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Belfast?

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

When are the longest days in Belfast?

With an average of 15h and 29min of daylight, June has the longest days of the year.

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

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

What are the warmest months in Belfast?

Warmest months in Belfast, Maine, are July and August, with an average high-temperature of 73.9°F (23.3°C).

What is the driest month in Belfast?

The months with the least rainfall in Belfast are July and September Rain falls for 14.5 days and accumulates 1.46" (37mm) of rain.

What month is the ocean warmest 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 month has the most sunshine in Belfast?

The month with the most sunshine in Belfast, Maine, is August, with an average of 9.9h of sunshine.

What is the least humid month in Belfast?

The least humid month in Belfast is November, with an average relative humidity of 77%.

What is the rainiest month in Belfast?

December is the month with the most rainfall in Belfast, Maine. Rain falls for 10.1 days and accumulates 2.72" (69mm) of precipitation.

What is the month with the shortest days in Belfast?

December has the shortest days of the year, with an average of 8h and 55min of daylight.

Average temperature
Belfast, ME

Average temperature - Belfast, ME

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).

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
Belfast, ME

Average pressure - Belfast, ME

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
Belfast, ME

Average wind speed - Belfast, ME

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
Belfast, ME

Average humidity - Belfast, ME

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
Belfast, ME

Average rainfall - Belfast, ME

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
Belfast, ME

Average rainfall days - Belfast, ME

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
Belfast, ME

Average snowfall - Belfast, ME

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
Belfast, ME

Average snowfall days - Belfast, ME

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
Belfast, ME

Average sea temperature - Belfast, ME

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 / Average sunshine
Belfast, ME

Average daylight / Average sunshine - Belfast, ME

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).

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
Belfast, ME

Average sunshine days - Belfast, ME

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
Belfast, ME

Average UV index - Belfast, ME

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 visibility
Belfast, ME

Average visibility - Belfast, ME

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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