Climate and monthly weather forecast
Belfast, PA

Weather in January

January, like December, in Belfast, Pennsylvania, is another cold winter month, with temperature in the range of an average high of 33.4°F (0.8°C) and an average low of 20.7°F (-6.3°C). January is the coldest month, with an average high-temperature of 33.4°F (0.8°C) and an average low-temperature of 20.7°F (-6.3°C). Weather in January »

Weather in February

February, the last month of the winter in Belfast, is also a wintry month, with an average temperature varying between 22.5°F (-5.3°C) and 36.5°F (2.5°C). In Belfast, the average high-temperature in February is relatively the same as in January - a still cold 36.5°F (2.5°C). Weather in February »

Weather in March

March, the first month of the spring in Belfast, is a frosty month, with an average temperature varying between 29.7°F (-1.3°C) and 45.1°F (7.3°C). In March, the average high-temperature slightly increases from a wintry 36.5°F (2.5°C) in February to a chilly 45.1°F (7.3°C). Weather in March »

Weather in April

April is a moderate spring month in Belfast, Pennsylvania, with temperature in the range of an average low of 39.7°F (4.3°C) and an average high of 57.6°F (14.2°C). In Belfast, the average high-temperature in April increases from a frosty 45.1°F (7.3°C) in March to a mild 57.6°F (14.2°C). Weather in April »

Weather in May

May, the last month of the spring in Belfast, is an agreeable month, with temperature in the range of an average high of 68.5°F (20.3°C) and an average low of 49.8°F (9.9°C). In Belfast, the average high-temperature in May increases from a mild 57.6°F (14.2°C) in April to an agreeable 68.5°F (20.3°C). Weather in May »

Weather in June

June, the first month of the summer in Belfast, is a moderately hot month, with an average temperature ranging between min 56.8°F (13.8°C) and max 76.6°F (24.8°C). In June, the average high-temperature marginally rises from an agreeable 68.5°F (20.3°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »

Weather in July

July, like June, in Belfast, Pennsylvania, is a moderately hot summer month, with an average temperature ranging between max 82.9°F (28.3°C) and min 62.2°F (16.8°C). July is the warmest month, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 62.2°F (16.8°C). The average heat index in July is calculated to be a tropical 89.6°F (32°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Belfast, Pennsylvania, with an average temperature ranging between min 60.4°F (15.8°C) and max 80.2°F (26.8°C). In August, the average high-temperature is relatively the same as in July - a still warm 80.2°F (26.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Belfast, Pennsylvania, with temperature in the range of an average high of 73.9°F (23.3°C) and an average low of 54.3°F (12.4°C). In September, the average high-temperature marginally drops from 80.2°F (26.8°C) in August to a still warm 73.9°F (23.3°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Belfast, Pennsylvania, with an average temperature varying between 61.2°F (16.2°C) and 45.1°F (7.3°C). In October, the average high-temperature drops from a moderately hot 73.9°F (23.3°C) in September to an enjoyable 61.2°F (16.2°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 48.4°F (9.1°C) and 34.3°F (1.3°C). In Belfast, Pennsylvania, the average high-temperature in November drops from a comfortable 61.2°F (16.2°C) in October to a chilly 48.4°F (9.1°C). Weather in November »

Weather in December

December, the first month of the winter in Belfast, is also a wintry month, with an average temperature varying between 39°F (3.9°C) and 27.5°F (-2.5°C). In December, the average high-temperature decreases from a frosty 48.4°F (9.1°C) in November to a wintry 39°F (3.9°C). Weather in December »
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FAQ

What is the coldest month in Belfast?

The coldest month in Belfast is January, with an average high-temperature of 33.4°F (0.8°C) and an average low-temperature of 20.7°F (-6.3°C).

How many days does it rain in Belfast?

In Belfast, during the entire year, the rain falls for 139.9 days and collects up to 19.88" (505mm) of precipitation.

When does it snow in Belfast?

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

How many days does it snow in Belfast?

In Belfast, Pennsylvania, during the entire year, snow falls for 24.7 days and aggregates up to 10.94" (278mm) of snow.

What is the most humid month in Belfast?

With an average relative humidity of 82%, February is the most humid month in Belfast.

What is the snowiest month in Belfast?

February is the month with the most snowfall in Belfast. Snow falls for 6.8 days and accumulates 2.52" (64mm) of snow.

What is the month with the least sunshine in Belfast?

February has the least sunshine of the year in Belfast, with an average of 4.5h of sunshine.

When is Daylight Saving Time (DST) in Belfast?

On Sunday, March 12. 2023, 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 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Belfast?

With an average relative humidity of 76%, April is the least humid month in Belfast, Pennsylvania.

When it does not snow in Belfast?

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

When are the longest days in Belfast?

June has the longest days of the year in Belfast, with an average of 15h and 3min of daylight.

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

The month with the highest UV index is June, with an average maximum UV index of 6.

What is the warmest month in Belfast?

With an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 62.2°F (16.8°C), July is the warmest month in Belfast.

What is the wettest month in Belfast?

The month with the most rainfall in Belfast is July, when the rain falls for 15.1 days and typically aggregates up to 2.32" (59mm) of precipitation.

What month has the most sunshine in Belfast?

The month with the most sunshine is July, with an average of 10.4h of sunshine.

What is the driest month in Belfast?

September is the month with the least rainfall in Belfast, Pennsylvania. Rain falls for 10.6 days and accumulates 1.02" (26mm) of precipitation.

What is the month with the shortest days in Belfast?

December has the shortest days of the year, with an average of 9h and 19min of daylight.

When is the lowest UV index in Belfast?

With an average maximum UV index of 1, December is the month with the lowest UV index in Belfast.

Average temperature
Belfast, PA

Average temperature - Belfast, PA

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.4°F).

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure
Belfast, PA

Average pressure - Belfast, PA

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed
Belfast, PA

Average wind speed - Belfast, PA

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average rainfall
Belfast, PA

Average rainfall - Belfast, PA

The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is September (1.02").

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Average rainfall days
Belfast, PA

Average rainfall days - Belfast, PA

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall
Belfast, PA

Average snowfall - Belfast, PA

The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Belfast, PA

Average snowfall days - Belfast, PA

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Belfast, PA

Average daylight / Average sunshine - Belfast, PA

The month with the longest days is June (Average daylight: 15h and 3min).
The month with the shortest days is December (Average daylight: 9h and 19min).

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days
Belfast, PA

Average sunshine days - Belfast, PA

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is July (13 days).

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Average visibility
Belfast, PA

Average visibility - Belfast, PA

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

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