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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
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). The lowest temperatures are recorded in January, with averages reaching a high of 33.4°F (0.8°C) and a low of 20.7°F (-6.3°C). Weather in January »
Weather in February
February, the last month of the winter in Belfast, is another cold month, with an average temperature varying between 22.5°F (-5.3°C) and 36.5°F (2.5°C). Belfast indicates an average high-temperature of a still cold 36.5°F (2.5°C) in February, showing minor variation from January's 33.4°F (0.8°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Belfast, Pennsylvania, with an average temperature varying between 29.7°F (-1.3°C) and 45.1°F (7.3°C). March's arrival brings a slight change in high-temperatures, adjusting from a cold 36.5°F (2.5°C) in February to a chilly 45.1°F (7.3°C). Weather in March »
Weather in April
April in Belfast, Pennsylvania, is a mild spring month, with temperature in the range of an average high of 57.6°F (14.2°C) and an average low of 39.7°F (4.3°C). As April sets, the average high-temperature shows an increase, moving up from a frosty 45.1°F (7.3°C) in March to a refreshing 57.6°F (14.2°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Belfast, Pennsylvania, with an average temperature varying between 49.8°F (9.9°C) and 68.5°F (20.3°C). With the arrival of May, the average high-temperature transitions from a refreshing 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 warm month, with an average temperature fluctuating between 56.8°F (13.8°C) and 76.6°F (24.8°C). The commencement of June sees a minor shift in the average high-temperature, moving from a pleasant 68.5°F (20.3°C) in May to a warm 76.6°F (24.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Belfast, Pennsylvania, with an average temperature fluctuating between 82.9°F (28.3°C) and 62.2°F (16.8°C). Belfast's temperature records reveal July as the warmest month, marked by average highs of 82.9°F (28.3°C) and lows of 62.2°F (16.8°C). The heat index value for July is calculated to be a hot 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Belfast, is another warm month, with an average temperature fluctuating between 60.4°F (15.8°C) and 80.2°F (26.8°C). The transition into August marks the average high-temperature at a still warm 80.2°F (26.8°C), differing minimally from July's 82.9°F (28.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Belfast, Pennsylvania, with temperature in the range of an average low of 54.3°F (12.4°C) and an average high of 73.9°F (23.3°C). September's arrival signals a moderate reduction in the average high-temperature, easing from a moderately hot 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 comfortable autumn month in Belfast, Pennsylvania, with an average temperature ranging between min 45.1°F (7.3°C) and max 61.2°F (16.2°C). The commencement of October indicates a shift in the average high-temperature, receding from September's moderately hot 73.9°F (23.3°C) to a comfortable 61.2°F (16.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Belfast, is another chilly month, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 48.4°F (9.1°C). The arrival of November corresponds with a shift in temperature, down 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
The first month of the winter, December, is also an icy month in Belfast, Pennsylvania, with temperature in the range of an average high of 39°F (3.9°C) and an average low of 27.5°F (-2.5°C). With December's onset, the average high-temperature recedes from November's frosty 48.4°F (9.1°C) to a cold 39°F (3.9°C). Weather in December »
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
Belfast experiences its lowest temperatures in January, with an average peak of 33.4°F (0.8°C) and a low of 20.7°F (-6.3°C).
How much does it rain?
Throughout the year, there are 139.9 rainfall days, and 19.88" (505mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow in Belfast?
Throughout the year, there are 24.7 snowfall days, and 10.94" (278mm) of snow is accumulated.
What is the most humid month?
With an average relative humidity of 82%, February is the most humid month.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 6.8 days and accumulates 2.52" (64mm) of snow.
What is the month with the least sunshine?
With an average of 4.5h of sunshine, February has the least sunshine of the year.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month?
The least humid month is April, with an average relative humidity of 76%.
When it does not snow?
In Belfast, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
When is the highest UV index?
The month with the highest UV index is June, with an average maximum UV index of 6.
What is the hottest time of year?
Belfast experiences its average highest temperatures in July, reaching a peak of 82.9°F (28.3°C) and a minimum of 62.2°F (16.8°C).
What is the wettest month?
July is the month with the most rainfall. Rain falls for 15.1 days and accumulates 2.32" (59mm) of precipitation.
What month has the most sunshine?
With an average of 10.4h of sunshine, July has the most sunshine of the year.
What is the driest month?
September is the month with the least rainfall in Belfast. Rain falls for 10.6 days and accumulates 1.02" (26mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
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).
Average pressure
Belfast, PA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Belfast, PA
- Average wind speed in January:
8mph - Average wind speed in February:
7.9mph - Average wind speed in March:
8.1mph - Average wind speed in April:
7.8mph - Average wind speed in May:
6.2mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7mph - Average wind speed in December:
7.5mph
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).
Average humidity
Belfast, PA
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Belfast, PA
- Average rainfall in January:
1.3" - Average rainfall in February:
1.22" - Average rainfall in March:
1.57" - Average rainfall in April:
1.77" - Average rainfall in May:
1.89" - Average rainfall in June:
1.69"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.09" - Average rainfall in September:
1.02" - Average rainfall in October:
1.73" - Average rainfall in November:
1.54" - Average rainfall in December:
1.73"
The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days
Belfast, PA
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
11.1 days - Average rainfall days in April:
13.9 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
14.2 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
9.4 days
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).
Average snowfall
Belfast, PA
- Average snowfall in January:
2.44" - Average snowfall in February:
2.52" - Average snowfall in March:
2.48" - Average snowfall in April:
0.2" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Belfast, PA
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
0.7 days - Average snowfall days in May:
0.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.1 days - Average snowfall days in December:
4.1 days
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).
Average daylight / Average sunshine
Belfast, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
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).
Average sunshine days
Belfast, PA
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
13.1 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
17 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
17.9 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is July (13 days).
Average UV index
Belfast, PA
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Belfast, PA
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 34).
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).