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September Weather in Lebanon, United States

Last updated: June 24, 2025

In September, the average temperature in Lebanon, United States hovers around 22°C (72°F). Be prepared for a range, as it can dip to a chilly 8°C (47°F) or soar up to a sweltering 36°C (97°F). Expect about 126 mm (5.0 in) of precipitation over 9 days, contributing to an average humidity of 71%. Make sure to pack accordingly!

September Temperature in Lebanon

In September in Lebanon, the average temperature is 22°C (72°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 8°C (47°F). This weather makes it an ideal time for outdoor activities and exploring the local attractions while enjoying comfortable temperatures.

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 22°C (72°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec374249576874787672614642
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 126 mm (5.0 in) spread over 9 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 126 mm (5.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec10317014615012116812211812612092141
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 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109753
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 Weather3°C (37°F)103 mm (4.0 inches)87%moderate
February Weather5°C (42°F)169 mm (6.7 inches)86%moderate
March Weather9°C (49°F)146 mm (5.7 inches)86%high
April Weather14°C (57°F)150 mm (5.9 inches)82%very high
May Weather20°C (68°F)121 mm (4.7 inches)82%very high
June Weather23°C (74°F)168 mm (6.6 inches)83%extreme
July Weather26°C (78°F)122 mm (4.8 inches)80%extreme
August Weather25°C (76°F)118 mm (4.7 inches)74%very high
September Weather22°C (72°F)126 mm (5.0 inches)71%very high
October Weather16°C (61°F)120 mm (4.7 inches)78%high
November Weather8°C (46°F)92 mm (3.6 inches)88%moderate
December Weather6°C (42°F)140 mm (5.5 inches)88%moderate

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