September Weather in Los Angeles, Mexico

Last updated: August 26, 2025

In September, the average temperature in Los Angeles, Mexico is a warm 29°C (85°F), with lows of 22°C (72°F) and highs reaching up to 38°C (101°F). Expect 122 mm (4.8 in) of precipitation over 16 days, contributing to an average humidity of 78%. Prepare for a tropical atmosphere, perfect for those who enjoy warm, humid weather!

September Temperature in Los Angeles

In September in Los Angeles, the average temperature is 29°C (85°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 22°C (72°F). This warm climate makes it an ideal destination for sun-seekers and outdoor enthusiasts looking to enjoy various activities.

September Weather in Los Angeles: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Los Angeles, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Angeles, September typically has an average temperature of 29°C (85°F), with highs reaching up to 38°C (101°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Los Angeles

In Los Angeles in September, the precipitation amount is 122 mm (4.8 in) spread over 16 days.

September Precipitation Trends in Los Angeles

The chart displays monthly precipitation patterns in Los Angeles, 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 Los Angeles, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Los Angeles

In Los Angeles in September humidity is 78%. With an average temperature of 29°C (85°F), this humidity feels like a warm, thick blanket wrapping around you, making travel somewhat challenging as you adjust to the muggy conditions. The air feels heavy, and the heat can be intense, prompting frequent breaks to find shade and staying hydrated to keep fatigue at bay.

September Average Humidity in Los Angeles

This chart illustrates the average monthly humidity levels in Los Angeles, 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 Los Angeles is approximately 78%, 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 Los Angeles

In Los Angeles in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Los Angeles.

Maximum UV Index Levels in Los Angeles for September

The chart shows the monthly maximum UV Index (UVI) for Los Angeles 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 Los Angeles typically reaches 12, which falls under the extreme exposure category.

Data source: Los Angeles 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 Los Angeles Compares to Other Months

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

This table compares monthly weather conditions in Los Angeles, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (66°F)	8 mm (0.3 inches)	70%	high
February Weather	19°C (67°F)	15 mm (0.6 inches)	67%	very high
March Weather	20°C (69°F)	3 mm (0.1 inches)	62%	very high
April Weather	23°C (73°F)	0 mm (0.0 inches)	58%	extreme
May Weather	25°C (78°F)	0 mm (0.0 inches)	59%	extreme
June Weather	28°C (84°F)	17 mm (0.7 inches)	64%	extreme
July Weather	30°C (87°F)	50 mm (2.0 inches)	74%	extreme
August Weather	30°C (87°F)	102 mm (4.0 inches)	78%	extreme
September Weather	29°C (85°F)	122 mm (4.8 inches)	78%	extreme
October Weather	28°C (83°F)	23 mm (0.9 inches)	75%	very high
November Weather	24°C (76°F)	26 mm (1.0 inches)	74%	high
December Weather	20°C (68°F)	11 mm (0.4 inches)	72%	high