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 max 74.7°F (23.7°C) and min 56.5°F (13.6°C).

Temperature

Lebanon records a mild change in average high-temperature during September, easing from a warm 81.9°F (27.7°C) in August to a still moderately hot 74.7°F (23.7°C). The average temperature during September nights dips to a mild 56.5°F (13.6°C).

Humidity

In September, the average relative humidity 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

In Lebanon, snow does not fall in June through September.

Daylight

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

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature during September is 74.7°F (23.7°C) and the low-temperature is 56.5°F (13.6°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is computed to be 87.8°F (31°C).

What is the average humidity in September in Lebanon?

In September, the average relative humidity is 78%.

What is the driest month?

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

How much does it rain in September?

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

When it does not snow?

June through September are months without snowfall.

Does it snow 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?

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

What time are sunrise and sunset in September?

On the first day of September, 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?

The average sunshine duration in September is 8.7h.

What is the UV index intensity in September?

In Lebanon, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Lebanon, New Jersey, USA

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