September weather forecastYoungsville, PA
September
Weather in September
September, the first month of the autumn in Youngsville, is also an agreeable month, with an average temperature varying between 70.2°F (21.2°C) and 50.9°F (10.5°C).Temperature
With the onset of September, Youngsville experiences a modest temperature adjustment, with the average high-temperature gently receding from a warm 76.3°F (24.6°C) in August to a pleasant 70.2°F (21.2°C). During September, Youngsville records a consistent average nighttime temperature of 50.9°F (10.5°C).Humidity
The average relative humidity in September is 82%.Rainfall
In Youngsville, in September, during 13.9 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 162.1 rainfall days, and 21.81" (554mm) of precipitation is accumulated.Snowfall
In Youngsville, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:43 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:00 pm EDT.
Sunshine
The average sunshine in September is 8.1h.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 exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Youngsville, PA
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in September
Youngsville, PA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Youngsville, PA
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Youngsville, PA
- Average humidity in September: 82%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (80%).
Average rainfall in September
Youngsville, PA
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is April (2.52").
The driest month (with the least rainfall) is March (1.42").
Average rainfall days in September
Youngsville, PA
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in September
Youngsville, PA
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Youngsville, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Youngsville, PA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 6min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 6min).
Average sunshine days in September
Youngsville, PA
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is September (12.9 days).
The month with the least sunshine days is January (5.1 days).
Average UV index in September
Youngsville, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Youngsville, PA
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Youngsville, PA
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, September, October and November (5mi).
The months with the lowest visibility are January, February, August and December (4mi).
