September weather forecast
Lebanon, PA

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Weather in September

The commencement of September sees a welcoming reduction in temperature, signaling the onset of fall in Lebanon, Pennsylvania. Daytime temperatures drop to a comfortable 73.8°F (23.2°C), accompanied by shorter daylight hours. The shift from summer to fall is marked by an increase in cloud cover, humidity, and wind gusts. Despite a decrease in sunshine hours, September maintains equally balanced weather suitable for both indoor and outdoor activities. Attention shifts towards fall-friendly wardrobe choices, emphasizing light jackets and layers.

Temperature

Lebanon, Pennsylvania, in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 79.9°F (26.6°C) in August to a still warm 73.8°F (23.2°C). Throughout September, Lebanon anticipates an average low-temperature of 55.4°F (13°C).

Humidity

The average relative humidity in September in Lebanon is 80%.

Rainfall

In September, in Lebanon, Pennsylvania, the rain falls for 10.5 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Lebanon, during the entire year, the rain falls for 137.4 days and collects up to 16.26" (413mm) of precipitation.

Snowfall

In 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 6:33 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:49 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: In September, an average UV index of 4 transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What is the average September temperature in Lebanon?

The average high-temperature, in September, in Lebanon, is 73.8°F (23.2°C), while the average low-temperature is 55.4°F (13°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 87.8°F (31°C).

What is the average humidity in September in Lebanon?

In Lebanon, the average relative humidity in September is 80%.

How many days does it rain in September in Lebanon?

In Lebanon, Pennsylvania, in September, it is raining for 10.5 days, with typically 1.02" (26mm) of accumulated precipitation.

When it does not snow in Lebanon?

June through September are months without snowfall in Lebanon, Pennsylvania.

Does it snow in Lebanon in September?

In Lebanon, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Lebanon have in September?

In Lebanon, Pennsylvania, the average day length in September is 12h and 27min.

When are sunrise and sunset in September in Lebanon?

In September, on the first day of the month, sunrise is at 6:33 am and sunset at 7:37 pm. On the last day of the month, in Lebanon, sunrise is at 7:01 am and sunset at 6:49 pm EDT.

How many hours of sunshine does Lebanon have in September?

In Lebanon, the average sunshine duration in September is 8.8h.

What is the UV index intensity in September in Lebanon?

In September, the average daily maximum UV index in Lebanon, Pennsylvania, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lebanon, PA

Average temperature in September - Lebanon, PA
  • Average high temperature in September: 73.8°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in September: 55.4°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in September
Lebanon, PA

Average pressure in September - 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 (29.94"Hg).

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Average wind speed in September
Lebanon, PA

Average wind speed in September - Lebanon, PA
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in September
Lebanon, PA

Average humidity in September - Lebanon, PA
  • Average humidity in September: 80%

The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in September
Lebanon, PA

Average rainfall in September - Lebanon, PA
  • Average rainfall in September: 1.02"

The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").

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Average rainfall days in September
Lebanon, PA

Average rainfall days in September - Lebanon, PA
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).

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Average snowfall in September
Lebanon, PA

Average snowfall in September - Lebanon, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Lebanon, PA

Average snowfall days in September - Lebanon, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Lebanon, PA

Average daylight in September / Average sunshine in September - 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 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in September
Lebanon, PA

Average sunshine days in September - Lebanon, PA
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in September
Lebanon, PA

Average UV index in September - Lebanon, PA
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Lebanon, PA

Average cloud cover in September - Lebanon, PA
  • Average cloud cover in September: 38

The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Lebanon, PA

Average visibility in September - Lebanon, PA
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).

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Lebanon, Pennsylvania, USA

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