September Weather in Lebanon, United States

Last updated: June 24, 2025

In Lebanon, United States, the average temperature in September hovers around 23°C (73°F), providing a comfortable climate for outdoor activities. You can expect the minimum temperature to drop to a cool 7°C (45°F), while it might soar to a warm 35°C (95°F) at its peak. The month also brings 52 mm (2.1 in) of precipitation spread across approximately 7 days, contributing to an average humidity level of 64%. Enjoy the mild yet vibrant atmosphere!

September Temperature in Lebanon

In September in Lebanon, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dipping as low as 7°C (45°F). It's advisable to pack both light clothing for the warmth and warmer layers for the cooler evenings during your travels.

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 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Lebanon generated using information from the Copernicus Climate Change Service.

September Precipitation in Lebanon

In Lebanon in September, the precipitation amount is 52 mm (2.1 in) over the course of 7 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 52 mm (2.1 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Lebanon

In Lebanon in September, humidity is 64%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel quite comfortable yet slightly sticky, urging travelers to enjoy leisurely activities early in the day or seek shade during peak hours.

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 64%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	79 mm (3.1 inches)	81%	moderate
February Weather	3°C (37°F)	76 mm (3.0 inches)	78%	high
March Weather	9°C (49°F)	130 mm (5.1 inches)	76%	high
April Weather	13°C (55°F)	144 mm (5.7 inches)	78%	very high
May Weather	19°C (66°F)	167 mm (6.6 inches)	83%	very high
June Weather	24°C (76°F)	96 mm (3.8 inches)	83%	extreme
July Weather	26°C (79°F)	95 mm (3.7 inches)	78%	extreme
August Weather	25°C (77°F)	92 mm (3.6 inches)	68%	very high
September Weather	23°C (73°F)	52 mm (2.1 inches)	64%	very high
October Weather	15°C (59°F)	136 mm (5.4 inches)	70%	high
November Weather	8°C (46°F)	63 mm (2.5 inches)	83%	moderate
December Weather	5°C (41°F)	49 mm (1.9 inches)	87%	moderate