September Weather in Los Angeles, Chile

Last updated: August 22, 2025

In September, the average temperature in Los Angeles, Chile hovers around 10°C (51°F). Temperatures can range from a chilly 0°C (32°F) to a pleasant 27°C (80°F). Be prepared for some rain, as 85 mm (3.3 in) of precipitation is expected over 9 days. With an average humidity of 68%, it's a season that balances mild warmth with a refreshing touch of moisture.

September Temperature in Los Angeles

In September in Los Angeles, the average temperature is 10°C (51°F), with maximums reaching 27°C (80°F) and minimums dropping as low as 0°C (32°F). This climate makes it an ideal time for travelers to enjoy a mix of pleasant warmth and cooler evenings.

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 10°C (51°F), with highs reaching up to 27°C (80°F) and lows dropping to around 0°C (32°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 85 mm (3.3 in) over the course of 9 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 85 mm (3.3 inches) of precipitation spread over approximately 9 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 Los Angeles

In Los Angeles in September, humidity is 68%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill enveloping you, making outdoor activities slightly uncomfortable yet invigorating, as the cool air bites against your skin, creating an atmosphere that is refreshing but requires appropriate clothing for a pleasant travel experience.

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 68%, 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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the high 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 (67°F)	25 mm (1.0 inches)	41%	extreme
February Weather	19°C (67°F)	15 mm (0.6 inches)	41%	extreme
March Weather	17°C (62°F)	33 mm (1.3 inches)	48%	very high
April Weather	13°C (56°F)	51 mm (2.0 inches)	60%	high
May Weather	10°C (50°F)	134 mm (5.3 inches)	79%	moderate
June Weather	8°C (47°F)	276 mm (10.9 inches)	82%	moderate
July Weather	8°C (46°F)	146 mm (5.7 inches)	85%	moderate
August Weather	8°C (47°F)	148 mm (5.8 inches)	83%	moderate
September Weather	10°C (51°F)	85 mm (3.3 inches)	68%	high
October Weather	12°C (54°F)	80 mm (3.1 inches)	64%	very high
November Weather	15°C (60°F)	49 mm (1.9 inches)	49%	extreme
December Weather	18°C (65°F)	15 mm (0.6 inches)	42%	extreme