September weather forecastSummerhill, PA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Summerhill, Pennsylvania, with an average temperature fluctuating between 72°F (22.2°C) and 52.7°F (11.5°C).Temperature
The average high-temperature shows a slight dip in September, from August's moderately hot 78.3°F (25.7°C) to an agreeable 72°F (22.2°C). Summerhill's nighttime temperature during September is consistently averaged at a fresh 52.7°F (11.5°C).Humidity
The average relative humidity in September in Summerhill is 80%.Rainfall
In Summerhill, in September, it is raining for 14.6 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, there are 165.8 rainfall days, and 29.84" (758mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Summerhill, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:43 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:58 pm EDT.
Sunshine
In Summerhill, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 3 during September leads to these instructions:
Ensure safety - Sun damage prevention is strongly urged. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Summerhill, PA
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Summerhill, 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 (29.95"Hg).
Average wind speed in September
Summerhill, PA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Summerhill, PA
- Average humidity in September: 80%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and July (78%).
Average rainfall in September
Summerhill, PA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in September
Summerhill, PA
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is December (8.8 days).
Average snowfall in September
Summerhill, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Summerhill, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Summerhill, 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 18min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Summerhill, PA
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (9.7 days).
Average UV index in September
Summerhill, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Summerhill, PA
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in September
Summerhill, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
