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September Weather in Lebanon, United States

Last updated: June 24, 2025

In September, the average temperature in Lebanon, United States is a pleasant 21°C (70°F). Expect a range from a cool 6°C (43°F) to a warm 34°C (94°F). During this month, you'll see about 80 mm (3.1 in) of precipitation spread over 8 days, with an average humidity of 73%. Enjoy the diverse climate that September brings!

September Temperature in Lebanon

In September in Lebanon, the average temperature is 21°C (70°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 6°C (43°F). This varied climate makes it an ideal destination for travelers looking to experience a mix of warm days and cooler evenings.

September Weather in Lebanon: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lebanon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lebanon, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec323644536573777570594338
Data source: Temperature data for Lebanon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Lebanon

In Lebanon in September, the precipitation amount is 80 mm (3.1 in) over a period of 8 days.

September Precipitation Trends in Lebanon

The chart displays monthly precipitation patterns in Lebanon, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Lebanon, September typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8110812711112813511987809899106
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lebanon

In Lebanon in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in Lebanon

This chart illustrates the average monthly humidity levels in Lebanon, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Lebanon is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lebanon

In Lebanon in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Lebanon.

Maximum UV Index Levels in Lebanon for September

The chart shows the monthly maximum UV Index (UVI) for Lebanon in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Lebanon typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Lebanon September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Lebanon Compares to Other Months

Weather in Lebanon varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Lebanon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lebanon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)81 mm (3.2 inches)88%moderate
February Weather2°C (36°F)108 mm (4.2 inches)88%moderate
March Weather7°C (44°F)127 mm (5.0 inches)87%high
April Weather12°C (54°F)111 mm (4.4 inches)85%very high
May Weather18°C (65°F)128 mm (5.0 inches)81%very high
June Weather23°C (73°F)135 mm (5.3 inches)82%very high
July Weather25°C (77°F)119 mm (4.7 inches)81%very high
August Weather24°C (75°F)87 mm (3.4 inches)73%very high
September Weather21°C (70°F)80 mm (3.1 inches)73%very high
October Weather15°C (59°F)98 mm (3.8 inches)78%high
November Weather6°C (43°F)99 mm (3.9 inches)89%moderate
December Weather3°C (38°F)106 mm (4.2 inches)87%moderate

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