September weather forecast
South Hills, PA

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Weather in September

September, the first month of the autumn in South Hills, is still a warm month, with an average temperature ranging between max 75.7°F (24.3°C) and min 55.9°F (13.3°C).

Temperature

The arrival of September corresponds with a light shift in temperature, down from 82.2°F (27.9°C) in August to a still warm 75.7°F (24.3°C). An average nighttime temperature of 55.9°F (13.3°C) is noted during the month of September.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In South Hills, in September, during 13.5 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. Throughout the year, in South Hills, there are 164 rainfall days, and 26.89" (683mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:48 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:03 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: In September, the UV index of 4 transforms into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Always opt for UVA and UVB-resistant sunglasses on radiant days.

Frequently asked questions

What is the average September temperature?

The average high-temperature and low-temperature during September are 75.7°F (24.3°C) and 55.9°F (13.3°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 87.8°F (31°C).

What is the average humidity in September?

In South Hills, the average relative humidity in September is 76%.

How much does it rain in September?

In South Hills, in September, during 13.5 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in September?

In South Hills, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in South Hills?

The average day length in September in South Hills is 12h and 27min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:48 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:03 pm EDT.

How many hours of sunshine does South Hills have in September?

In South Hills, the average sunshine duration in September is 8.4h.

How high is the UV index in September?

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
South Hills, PA

Average temperature in September - South Hills, PA
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in September: 55.9°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

Average pressure in September
South Hills, PA

Average pressure in September - South Hills, PA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in September
South Hills, PA

Average wind speed in September - South Hills, PA
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in September
South Hills, PA

Average humidity in September - South Hills, PA
  • Average humidity in September: 76%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (73%).

Average rainfall in September
South Hills, PA

Average rainfall in September - South Hills, PA
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.61").

Average rainfall days in September
South Hills, PA

Average rainfall days in September - South Hills, PA
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).

Average snowfall in September
South Hills, PA

Average snowfall in September - South Hills, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
South Hills, PA

Average snowfall days in September - South Hills, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
South Hills, PA

Average daylight in September / Average sunshine in September - South Hills, PA
  • Average daylight in September: 12h 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 18min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

Average sunshine days in September
South Hills, PA

Average sunshine days in September - South Hills, PA
  • Average sunshine days in September: 14 days

The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (9.5 days).

Average UV index in September
South Hills, PA

Average UV index in September - South Hills, PA
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
South Hills, PA

Average cloud cover in September - South Hills, PA
  • Average cloud cover in September: 39

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in September
South Hills, PA

Average visibility in September - South Hills, PA
  • Average visibility in September: 5mi

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

South Hills, Pennsylvania, USA

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