December Weather in Lebanon, United States

Last updated: June 24, 2025

In December, the average temperature in Lebanon, United States hovers around 4°C (40°F). Temperatures can dip as low as -18°C (-1°F) and rise to a maximum of 20°C (68°F). Expect about 120 mm (4.7 in) of precipitation across 12 days, with average humidity levels reaching a high 86%.

December Temperature in Lebanon

In December in Lebanon, the average temperature is 4°C (40°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop as low as -18°C (-1°F). Be sure to pack layers to stay comfortable while exploring the diverse weather conditions.

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

The chart illustrates December 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, December typically has an average temperature of 4°C (40°F), with highs reaching up to 20°C (68°F) and lows dropping to around -18°C (-1°F).

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

December Precipitation in Lebanon

In Lebanon in December, the precipitation amount is 120 mm (4.7 in) over a period of 12 days.

December Precipitation Trends in Lebanon

The chart displays monthly precipitation patterns in Lebanon, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Lebanon, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Lebanon

In Lebanon in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Lebanon

This chart illustrates the average monthly humidity levels in Lebanon, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Lebanon is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lebanon

In Lebanon in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Lebanon, you can check the information here.

Maximum UV Index Levels in Lebanon for December

The chart shows the monthly maximum UV Index (UVI) for Lebanon in December, 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 December, the maximum UV index in Lebanon typically reaches 3, which falls under the moderate exposure category.

Data source: Lebanon December 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 December 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 December’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 December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	92 mm (3.6 inches)	87%	moderate
February Weather	5°C (42°F)	161 mm (6.3 inches)	87%	high
March Weather	8°C (47°F)	126 mm (5.0 inches)	86%	very high
April Weather	12°C (54°F)	143 mm (5.6 inches)	84%	very high
May Weather	17°C (64°F)	122 mm (4.8 inches)	83%	extreme
June Weather	21°C (69°F)	135 mm (5.3 inches)	83%	extreme
July Weather	23°C (73°F)	92 mm (3.6 inches)	79%	extreme
August Weather	22°C (71°F)	95 mm (3.7 inches)	66%	very high
September Weather	20°C (68°F)	102 mm (4.0 inches)	68%	very high
October Weather	14°C (58°F)	119 mm (4.7 inches)	78%	high
November Weather	7°C (44°F)	75 mm (3.0 inches)	89%	moderate
December Weather	4°C (40°F)	120 mm (4.7 inches)	86%	moderate