Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's warm 77.2°F (25.1°C) to a pleasant 70.3°F (21.3°C). Leolyn, in September, experiences an average temperature of 50°F (10°C) at night.Humidity
In Leolyn, Pennsylvania, the average relative humidity in September is 81%.Rainfall
In Leolyn, in September, it is raining for 13.7 days, with typically 2.24" (57mm) of accumulated precipitation. In Leolyn, during the entire year, the rain falls for 171.9 days and collects up to 28.54" (725mm) of precipitation.Snowfall
June through September are months without snowfall in Leolyn.Daylight
In September, the average length of the day in Leolyn, Pennsylvania, is 12h and 28min.On the first day of September in Leolyn, sunrise is at 6:34 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:50 pm EDT.
Sunshine
In September, the average sunshine in Leolyn is 8.4h.UV index
In September, the average daily maximum UV index in Leolyn is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The UV index of 3 during September leads to these advisories:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Leolyn in September?
What is the average humidity in September in Leolyn?
How many days does it rain in September in Leolyn?
When it does not snow in Leolyn?
Does it snow in Leolyn in September?
What is the average length of the day in September in Leolyn?
When is the sunrise / sunset in September in Leolyn?
How long on average sun shines in September in Leolyn?
How high is the UV index in September in Leolyn?
Average temperature in September
Leolyn, PA
- Average high temperature in September: 70.3°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 (28.8°F).
- Average low temperature in September: 50°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in September
Leolyn, PA
- Average pressure in September: 30.07"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Leolyn, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Leolyn, PA
- Average humidity in September: 81%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (78%).
Average rainfall in September
Leolyn, PA
- Average rainfall in September: 2.24"
The wettest months (with the highest rainfall) are April and July (2.91").
The driest months (with the least rainfall) are January and November (1.77").
Average rainfall days in September
Leolyn, PA
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (8.6 days).
Average snowfall in September
Leolyn, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Leolyn, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Leolyn, PA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are February and December (Average sunshine: 3h and 12min).
Average sunshine days in September
Leolyn, PA
- Average sunshine days in September: 14 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in September
Leolyn, 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
Leolyn, PA
- Average cloud cover in September: 44
The months with the most cloud cover are January, February and December (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in September
Leolyn, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Leolyn, Pennsylvania, USA
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