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
September is marked by a subtle drop in average high-temperatures, transitioning from a warm 79.7°F (26.5°C) in August to a pleasant 72.9°F (22.7°C). During September, West Lebanon records a consistent average nighttime temperature of 52.9°F (11.6°C).Humidity
In West Lebanon, the average relative humidity in September is 79%.Rainfall
In West Lebanon, in September, it is raining for 12.7 days, with typically 1.73" (44mm) of accumulated precipitation. In West Lebanon, during the entire year, the rain falls for 162.4 days and collects up to 23.43" (595mm) of precipitation.Snowfall
In West Lebanon, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:00 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September in West Lebanon?
What is the UV index intensity in September?
Average temperature in September
West Lebanon, PA
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in September
West Lebanon, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
West Lebanon, PA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
West Lebanon, PA
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in September
West Lebanon, PA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is November (1.3").
Average rainfall days in September
West Lebanon, PA
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
West Lebanon, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
West Lebanon, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
West Lebanon, 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 18min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
West Lebanon, PA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is September (14.8 days).
The months with the least sunshine days are January and February (7.8 days).
Average UV index in September
West Lebanon, 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
West Lebanon, PA
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
West Lebanon, 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).
West Lebanon, Pennsylvania, USA
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