September weather forecastSeven Valleys, PA
September
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 12h and 24min
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 54min
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: 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: 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: 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: 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).
