Monthly weather forecast and climate
Belfast, ME

Weather in January

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

Weather in February

The last month of the winter, February, is another freezing cold month in Belfast, Maine, with average temperature varying between 17.4°F (-8.1°C) and 29.8°F (-1.2°C). In February, the average high-temperature is practically the same as in January - a still subzero 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 temperature in the range of an average low of 24.3°F (-4.3°C) and an average high of 37°F (2.8°C). In March, the average high-temperature marginally rises, from a subzero cold 29.8°F (-1.2°C) in February, to a wintry 37°F (2.8°C). Weather in March »

Weather in April

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

Weather in May

May, the last month of the spring, in Belfast, is a mild month, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 43.9°F (6.6°C). In May, the average high-temperature increases, 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

The first month of the summer, June, is a comfortable month in Belfast, Maine, with average temperature ranging between max 66.7°F (19.3°C) and min 50.7°F (10.4°C). In Belfast, the average high-temperature marginally rises, 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 is a moderately hot summer month in Belfast, Maine, with average temperature ranging between min 57.7°F (14.3°C) and max 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 July »

Weather in August

August, the last month of the summer, in Belfast, is another warm month, with average temperature fluctuating between 73.9°F (23.3°C) and 56.8°F (13.8°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

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

Weather in October

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

Weather in November

The last month of the autumn, November, is also a frosty month in Belfast, Maine, with temperature in the range of an average high of 44.1°F (6.7°C) and an average low of 32.7°F (0.4°C). In Belfast, the average high-temperature 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 still a cold month in Belfast, Maine, with average temperature fluctuating between 34.2°F (1.2°C) and 24.1°F (-4.4°C). In December, the average high-temperature drops, from a frosty 44.1°F (6.7°C) in November, to a cold 34.2°F (1.2°C). Weather in December »
[Resources]

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?

In Belfast, Maine, during the entire year, the rain falls for 141.1 days and collects up to 24.29" (617mm) of precipitation.

When does it snow in Belfast?

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

When does it snow the most in Belfast?

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

How much does it snow in Belfast?

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

What is the month with 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.

What are the most humid months in Belfast?

Months with the highest humidity in Belfast, Maine, are February and July, with an average relative humidity of 83%.

What is the month with the least sunshine in Belfast?

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

When is the ocean coldest in Belfast?

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

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?

The month with the longest days in Belfast is June, with an average of 15.5h of daylight.

What are the months 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.

What are the warmest months in Belfast?

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

What is the driest month in Belfast?

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

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.

What month has the most sunshine in Belfast?

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

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?

The month with the most rainfall is December when the rain falls for 10.1 days and typically aggregates up to 2.72" (69mm) of precipitation.

What is the month with the shortest days in Belfast?

With an average of 8.9h of daylight, December has the shortest days of the year in Belfast.

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).

[Resources]

Average pressure
Belfast, ME

Average pressure - Belfast, ME

The month with the highest atmospheric pressure is September (30.04").
The month with the lowest atmospheric pressure is June (29.91").

[Resources]

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).

[Resources]

Average humidity
Belfast, ME

Average humidity - Belfast, ME

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

[Resources]

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").

[Resources]

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).

[Resources]

Average snowfall
Belfast, ME

Average snowfall - Belfast, ME

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

[Resources]

Average snowfall days
Belfast, ME

Average snowfall days - Belfast, ME

The month with the highest number of snowfall days is January (10.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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).

[Resources]

Average daylight / Average sunshine
Belfast, ME

Average daylight / Average sunshine - Belfast, ME

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

The month with the most sunshine is August (Average sunshine: 9.9h).
The month with the least sunshine is February (Average sunshine: 4.3h).

[Resources]

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).

[Resources]

Average UV index
Belfast, ME

Average UV index - Belfast, ME

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

[Resources]

Average visibility
Belfast, ME

Average visibility - Belfast, ME

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location