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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
Weather in January
January, the same as December, is another cold winter month in South Mountain, Pennsylvania, with an average temperature varying between 35.4°F (1.9°C) and 22.6°F (-5.2°C). January, with its average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 22.6°F (-5.2°C), holds the record as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another cold month in South Mountain, Pennsylvania, with an average temperature ranging between max 39.7°F (4.3°C) and min 24.4°F (-4.2°C). The arrival of February marks a slight shift to an average high-temperature of a still cold 39.7°F (4.3°C) from January's 35.4°F (1.9°C). Weather in February »
Weather in March
March, the first month of the spring in South Mountain, is a frosty month, with an average temperature fluctuating between 48.7°F (9.3°C) and 31.6°F (-0.2°C). South Mountain, Pennsylvania, in March sees a temperature change, with average high-temperatures moving from a cold 39.7°F (4.3°C) in February to a frosty 48.7°F (9.3°C). Weather in March »
Weather in April
April in South Mountain, Pennsylvania, is a comfortable spring month, with an average temperature ranging between min 41.7°F (5.4°C) and max 61.2°F (16.2°C). South Mountain experiences a temperature shift with the start of April, with average high-temperatures moving from a frosty 48.7°F (9.3°C) in March to an enjoyable 61.2°F (16.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in South Mountain, Pennsylvania, with an average temperature fluctuating between 71.1°F (21.7°C) and 51.8°F (11°C). An increase in the average high-temperature marks May, moving from April's enjoyable 61.2°F (16.2°C) to a pleasant 71.1°F (21.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in South Mountain, Pennsylvania, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 58.6°F (14.8°C). As May transitions into June, South Mountain notices a gentle rise in the average high-temperature, transitioning from an agreeable 71.1°F (21.7°C) to a warm 79.2°F (26.2°C). Weather in June »
Weather in July
July, like June, in South Mountain, Pennsylvania, is another warm summer month, with temperature in the range of an average low of 63.7°F (17.6°C) and an average high of 84.2°F (29°C). July, marked by an average high-temperature of 84.2°F (29°C) and a low-temperature of 63.7°F (17.6°C), is the warmest month. July's heat index is appraised at a hot 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in South Mountain, is another warm month, with an average temperature ranging between min 62.2°F (16.8°C) and max 81.7°F (27.6°C). A minimal variation is noted in South Mountain's average high-temperature at the onset of August, reaching a still moderately hot 81.7°F (27.6°C) from July's 84.2°F (29°C). Weather in August »
Weather in September
September, the first month of the autumn in South Mountain, is also a moderately hot month, with an average temperature varying between 55.9°F (13.3°C) and 74.8°F (23.8°C). The advent of September brings a slight shift in average high-temperature, moving from a moderately hot 81.7°F (27.6°C) in August to a still warm 74.8°F (23.8°C). Weather in September »
Weather in October
October, like September, in South Mountain, Pennsylvania, is another comfortable autumn month, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 63.1°F (17.3°C). The commencement of October indicates a shift in the average high-temperature, receding from September's moderately hot 74.8°F (23.8°C) to a comfortable 63.1°F (17.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in South Mountain, Pennsylvania, with an average temperature fluctuating between 35.1°F (1.7°C) and 50.4°F (10.2°C). Setting in of November comes with a decrease in the average high-temperature, moving from an enjoyable 63.1°F (17.3°C) in October to a cool 50.4°F (10.2°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in South Mountain, Pennsylvania, with an average temperature varying between 29.3°F (-1.5°C) and 41.5°F (5.3°C). Transitioning from November to December involves a subtle drop in average high-temperatures, descending from a cool 50.4°F (10.2°C) to a wintry 41.5°F (5.3°C). Weather in December »
Updated: Aug 18, 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?
January, on average, is the coldest month, registering a high temperature of 35.4°F (1.9°C) and a low of 22.6°F (-5.2°C).
How many days does it rain?
In South Mountain, during the entire year, the rain falls for 125.3 days and collects up to 10.59" (269mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 6.7 days and typically aggregates up to 1.06" (27mm) of snow.
How many days does it snow?
Throughout the year, there are 20.2 snowfall days, and 3.54" (90mm) of snow is accumulated.
What are the months with the lowest UV index in South Mountain?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the most humid month?
February, May and October, with an average relative humidity of 80%, are most humid months.
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 rainiest month?
May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 1.26" (32mm) of precipitation.
When it does not snow?
In South Mountain, snow does not fall in May through October.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index in South Mountain.
What are the warmest months?
The warmest time of the year is July, with temperatures averaging a high of 84.2°F (29°C) and a low of 63.7°F (17.6°C).
What is the least humid month?
July is the least humid month, with an average relative humidity of 75%.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.5h of sunshine.
What is the driest month?
September is the month with the least rainfall. Rain falls for 10 days and accumulates 0.55" (14mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
South Mountain, PA
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure
South Mountain, PA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
South Mountain, PA
- Average wind speed in January:
8mph - Average wind speed in February:
7.9mph - Average wind speed in March:
7.8mph - Average wind speed in April:
7.8mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.7mph - Average wind speed in September:
5.3mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.9mph - Average wind speed in December:
7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity
South Mountain, PA
The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall
South Mountain, PA
- Average rainfall in January:
0.71" - Average rainfall in February:
0.67" - Average rainfall in March:
0.71" - Average rainfall in April:
1.02" - Average rainfall in May:
1.26" - Average rainfall in June:
0.98"
- Average rainfall in July:
1.18" - Average rainfall in August:
1.1" - Average rainfall in September:
0.55" - Average rainfall in October:
0.94" - Average rainfall in November:
0.75" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days
South Mountain, PA
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
7.7 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
13.5 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
12.5 days
- Average rainfall days in July:
14.5 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
10 days - Average rainfall days in October:
9.3 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5.4 days).
Average snowfall
South Mountain, PA
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
South Mountain, PA
- Average snowfall days in January:
6.7 days - Average snowfall days in February:
5.9 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
0.4 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
0.6 days - Average snowfall days in December:
2.9 days
The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
South Mountain, 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
South Mountain, PA
- Average sunshine days in January:
20.6 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
16.8 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
14.8 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
15.1 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
21.7 days - Average sunshine days in December:
20.7 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is May (12.9 days).
Average UV index
South Mountain, PA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
South Mountain, PA
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
South Mountain, PA
The months with the highest visibility are March, April, June, July, November and December (6mi).
The months with the lowest visibility are January, February, May, August, September and October (5mi).
South Mountain, Pennsylvania, USA
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