September weather forecast
Lebanon, NJ

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Weather in September

September, the first month of the autumn in Lebanon, is still a warm month, with an average temperature ranging between min 56.5°F (13.6°C) and max 74.7°F (23.7°C).

Temperature

September's arrival signals a moderate reduction in the average high-temperature, easing from a moderately hot 81.9°F (27.7°C) in August to a still warm 74.7°F (23.7°C). In Lebanon, the average temperature during the nights of September drops to a refreshing 56.5°F (13.6°C).

Humidity

The average relative humidity in September in Lebanon, New Jersey, is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.1 days and accumulates 1.54" (39mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of the month, sunrise is at 6:27 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:42 pm EDT.

Sunshine

In Lebanon, New Jersey, the average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in September interprets into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun is at its strongest around midday, find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
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Frequently asked questions

What are September temperatures in Lebanon?

In September, in Lebanon, the average high-temperature is 74.7°F (23.7°C), and the average low-temperature is 56.5°F (13.6°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is evaluated at 87.8°F (31°C).

What is the average humidity in September in Lebanon?

In Lebanon, New Jersey, the average relative humidity in September is 78%.

What is the driest month in Lebanon?

The month with the least rainfall is September, when the rain falls for 12.1 days and typically collects 1.54" (39mm) of precipitation.

How many days does it rain in September in Lebanon?

In Lebanon, New Jersey, during September, the rain falls for 12.1 days and regularly aggregates up to 1.54" (39mm) of precipitation.

When it does not snow in Lebanon?

June through September are months without snowfall in Lebanon, New Jersey.

Does it snow in Lebanon in September?

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

What is the average length of the day in September in Lebanon?

The average day length in September in Lebanon is 12h and 27min.

When is the sunrise / sunset in September in Lebanon?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:42 pm EDT.

How long on average sun shines in September in Lebanon?

In Lebanon, New Jersey, the average sunshine duration in September is 8.7h.

How high is the UV index in September in Lebanon?

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's 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, NJ

Average temperature in September - Lebanon, NJ
  • Average high temperature in September: 74.7°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 56.5°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in September
Lebanon, NJ

Average pressure in September - Lebanon, NJ
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Lebanon, NJ

Average wind speed in September - Lebanon, NJ
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in September
Lebanon, NJ

Average humidity in September - Lebanon, NJ
  • Average humidity in September: 78%

The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in September
Lebanon, NJ

Average rainfall in September - Lebanon, NJ
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is July (2.95").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in September
Lebanon, NJ

Average rainfall days in September - Lebanon, NJ
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (9 days).

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Average snowfall in September
Lebanon, NJ

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

The month with the highest snowfall is March (3.78").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Lebanon, NJ

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

The month with the highest number of snowfall days is January (8.1 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, NJ

Average daylight in September / Average sunshine in September - Lebanon, NJ
  • Average daylight in September: 12h and 3min

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 4min

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 36min).

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Average sunshine days in September
Lebanon, NJ

Average sunshine days in September - Lebanon, NJ
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (11.7 days).

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Average UV index in September
Lebanon, NJ

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

The months with the highest UV index are June, July and August (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, NJ

Average cloud cover in September - Lebanon, NJ
  • Average cloud cover in September: 39

The months with the most cloud cover are February and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).

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Average visibility in September
Lebanon, NJ

Average visibility in September - Lebanon, NJ
  • 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, New Jersey, USA

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