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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, like December, in South Mountain, Pennsylvania, is an icy winter month, with an average temperature varying between 22.6°F (-5.2°C) and 35.4°F (1.9°C). South Mountain records the coldest temperatures in January, averaging a high of 35.4°F (1.9°C) and a low of 22.6°F (-5.2°C). Weather in January »
Weather in February
February, the last month of the winter in South Mountain, is another cold month, with temperature in the range of an average low of 24.4°F (-4.2°C) and an average high of 39.7°F (4.3°C). The commencement of February records an average high-temperature of a still icy 39.7°F (4.3°C), barely varying from January's 35.4°F (1.9°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in South Mountain, Pennsylvania, with an average temperature fluctuating between 31.6°F (-0.2°C) and 48.7°F (9.3°C). As February transitions into March, a change in temperatures is observed, with average highs moving from a cold 39.7°F (4.3°C) to a frosty 48.7°F (9.3°C). Weather in March »
Weather in April
April in South Mountain, Pennsylvania, is an enjoyable spring month, with temperature in the range of an average low of 41.7°F (5.4°C) and an average high of 61.2°F (16.2°C). The arrival of April sees a shift in the average high-temperature, moving from a frosty 48.7°F (9.3°C) in March to a refreshing 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 varying between 71.1°F (21.7°C) and 51.8°F (11°C). With the onset of May, the average high-temperature slightly shifts from April's enjoyable 61.2°F (16.2°C) to an agreeable 71.1°F (21.7°C). Weather in May »
Weather in June
June, the first month of the summer in South Mountain, is a moderately hot month, with an average temperature varying between 58.6°F (14.8°C) and 79.2°F (26.2°C). The commencement of June sees a minor shift in the average high-temperature, moving from a pleasant 71.1°F (21.7°C) in May to a warm 79.2°F (26.2°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in South Mountain, Pennsylvania, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 63.7°F (17.6°C). The temperatures reach their highest averages in July, with highs of 84.2°F (29°C) and lows of 63.7°F (17.6°C). July's mean 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 also a moderately hot month, with an average temperature fluctuating between 62.2°F (16.8°C) and 81.7°F (27.6°C). With the onset of August, the average high-temperature stands at a still warm 81.7°F (27.6°C), closely aligned with July's 84.2°F (29°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in South Mountain, Pennsylvania, with an average temperature fluctuating between 74.8°F (23.8°C) and 55.9°F (13.3°C). September marks a gentle change in average high-temperature, declining from August's moderately hot 81.7°F (27.6°C) 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 an average temperature ranging between min 46.2°F (7.9°C) and max 63.1°F (17.3°C). The arrival of October corresponds with a reduction in the average high-temperature, down from September's warm 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 another cool month in South Mountain, Pennsylvania, with an average temperature varying between 35.1°F (1.7°C) and 50.4°F (10.2°C). Start of November brings a shift in the average high-temperature, falling from October's comfortable 63.1°F (17.3°C) to a cool 50.4°F (10.2°C). Weather in November »
Weather in December
December, the first month of the winter in South Mountain, is still a cold month, with temperature in the range of an average high of 41.5°F (5.3°C) and an average low of 29.3°F (-1.5°C). The arrival of December is marked by a minor reduction in average high-temperature, sliding from a cool 50.4°F (10.2°C) in November to an icy 41.5°F (5.3°C). Weather in December »
Updated: Jun 4, 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 month is the coldest?
January, with an average high of 35.4°F (1.9°C) and a low of 22.6°F (-5.2°C), signifies the coldest month of the year.
How much 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.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 6.7 days and accumulates 1.06" (27mm) of snow.
How much does it snow?
In South Mountain, Pennsylvania, during the entire year, snow falls for 20.2 days and aggregates up to 3.54" (90mm) of snow.
What are the months with the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What are the most humid months?
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 in South Mountain.
When is Daylight Saving Time (DST) in South Mountain?
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 wettest month?
The month with the most rainfall is May, when the rain falls for 14.9 days and typically aggregates up to 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.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
In South Mountain, July is the warmest month, 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 in South Mountain, Pennsylvania, with an average relative humidity of 75%.
What month has the most sunshine?
With an average of 10.5h of sunshine, July has the most sunshine of the year.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 10 days and typically collects 0.55" (14mm) of precipitation.
What is the month with the shortest days?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
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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