September weather forecast
Seven Valleys, PA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Seven Valleys, Pennsylvania, with an average temperature fluctuating between 56.8°F (13.8°C) and 75°F (23.9°C).

Temperature

September's onset brings a negligible change in high-temperatures, falling from 81.1°F (27.3°C) in August to a still warm 75°F (23.9°C). Throughout September nights, Seven Valleys experiences a consistent temperature average of 56.8°F (13.8°C).

Humidity

In Seven Valleys, the average relative humidity in September is 79%.

Rainfall

In Seven Valleys, in September, it is raining for 9.4 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 124 rainfall days, and 11.85" (301mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:50 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. When the Sun is at its strongest around midday, find shade and limit exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Jul 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

The average high-temperature and low-temperature during September are 75°F (23.9°C) and 56.8°F (13.8°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is estimated at 86°F (30°C).

What is the average humidity in September?

In Seven Valleys, the average relative humidity in September is 79%.

How much does it rain in September?

In Seven Valleys, during September, the rain falls for 9.4 days and regularly aggregates up to 0.79" (20mm) of precipitation.

When it does not snow?

In Seven Valleys, snow does not fall in June through October.

How many hours of daylight does Seven Valleys have in September?

In September, the average day length is 12h and 26min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:35 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:50 pm EDT.

How many hours of sunshine does Seven Valleys have in September?

The average sunshine duration in September is 8.9h.

How high is the UV index in September?

In Seven Valleys, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
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
Seven Valleys, PA

Average temperature in September - Seven Valleys, PA
  • Average high temperature in September: 75°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 (36°F).

  • Average low temperature in September: 56.8°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

Average pressure in September
Seven Valleys, PA

Average pressure in September - Seven Valleys, PA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Seven Valleys, PA

Average wind speed in September - Seven Valleys, PA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in September
Seven Valleys, PA

Average humidity in September - Seven Valleys, PA
  • Average humidity in September: 79%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (75%).

Average rainfall in September
Seven Valleys, PA

Average rainfall in September - Seven Valleys, PA
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days in September
Seven Valleys, PA

Average rainfall days in September - Seven Valleys, PA
  • Average rainfall days in September: 9.4 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (5.9 days).

Average snowfall in September
Seven Valleys, PA

Average snowfall in September - Seven Valleys, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.02").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Seven Valleys, PA

Average snowfall days in September - Seven Valleys, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Seven Valleys, PA

Average daylight in September / Average sunshine in September - Seven Valleys, 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 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in September
Seven Valleys, PA

Average sunshine days in September - Seven Valleys, PA
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (13.2 days).

Average UV index in September
Seven Valleys, PA

Average UV index in September - Seven Valleys, PA
  • Average UV index in September: 4

The months with the highest UV index are May, 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 in September
Seven Valleys, PA

Average cloud cover in September - Seven Valleys, PA
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in September
Seven Valleys, PA

Average visibility in September - Seven Valleys, PA
  • Average visibility in September: 5mi

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

Seven Valleys, Pennsylvania, USA

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