September Weather in Los Angeles, Mexico

Last updated: August 27, 2025

In September, the average temperature in Los Angeles, Mexico reaches a pleasant 20°C (68°F). Expect a minimum of 10°C (50°F) and a maximum of 31°C (89°F), offering a comfortable range for outdoor activities. With an average precipitation of 156 mm (6.1 in) over 17 days, it's wise to prepare for occasional rain. Don't forget, the average humidity is quite high at 81%, contributing to that invigorating tropical feeling!

September Temperature in Los Angeles

In September in Los Angeles, the average temperature is 20°C (68°F). Maximums can reach 31°C (89°F), and minimums can be as low as 10°C (50°F). This moderate climate makes Los Angeles an ideal destination for travelers seeking pleasant weather and a range of outdoor 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 20°C (68°F), with highs reaching up to 31°C (89°F) and lows dropping to around 10°C (50°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 156 mm (6.1 in), occurring over a span of 17 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 156 mm (6.1 inches) of precipitation spread over approximately 17 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 81%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace that can make outdoor activities feel steamy and exhausting, potentially leading travelers to seek shade or a refreshing drink more often.

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 81%, 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 reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. 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 13, 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	16°C (61°F)	3 mm (0.1 inches)	74%	very high
February Weather	18°C (65°F)	6 mm (0.3 inches)	65%	extreme
March Weather	21°C (70°F)	9 mm (0.4 inches)	58%	extreme
April Weather	23°C (73°F)	5 mm (0.2 inches)	58%	extreme
May Weather	24°C (75°F)	49 mm (1.9 inches)	67%	extreme
June Weather	22°C (73°F)	156 mm (6.1 inches)	76%	extreme
July Weather	21°C (69°F)	155 mm (6.1 inches)	67%	extreme
August Weather	21°C (70°F)	152 mm (6.0 inches)	68%	extreme
September Weather	20°C (68°F)	156 mm (6.1 inches)	81%	extreme
October Weather	20°C (68°F)	49 mm (1.9 inches)	83%	extreme
November Weather	18°C (64°F)	18 mm (0.7 inches)	84%	very high
December Weather	16°C (61°F)	4 mm (0.2 inches)	81%	very high