September Weather in Lake Los Angeles, United States

Last updated: June 24, 2025

In Lake Los Angeles, United States, the average temperature in September is a pleasant 23°C (73°F). However, be prepared for temperature swings, as the minimum can drop to 8°C (46°F) while the maximum may reach a scorching 40°C (104°F). During this month, expect a modest precipitation of 7 mm (0.3 in) over just 2 days, with an average humidity level of 48%. Stay hydrated and enjoy the diverse climate!

September Temperature in Lake Los Angeles

In September in Lake Los Angeles, the average temperature is 23°C (73°F), with maximums reaching up to 40°C (104°F) and minimums dipping as low as 8°C (46°F). It's advisable to pack for both warm days and cooler nights to make the most of your visit.

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

The chart illustrates September temperature patterns in Lake 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 Lake Los Angeles, September typically has an average temperature of 23°C (73°F), with highs reaching up to 40°C (104°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Lake Los Angeles

In Lake Los Angeles in September, the precipitation amount is 7 mm (0.3 in) over a period of 2 days.

September Precipitation Trends in Lake Los Angeles

The chart displays monthly precipitation patterns in Lake 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 Lake Los Angeles, September typically receives around 7 mm (0.3 inches) of precipitation spread over approximately 2 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 Lake Los Angeles

In Lake Los Angeles in September humidity is 48%. With an average temperature of 23°C (73°F), this humidity feels like a pleasant embrace, making it comfortable for traveling while allowing you to enjoy outdoor activities without feeling overly sticky or weighed down.

September Average Humidity in Lake Los Angeles

This chart illustrates the average monthly humidity levels in Lake 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 Lake Los Angeles is approximately 48%, 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 Lake Los Angeles

In Lake Los Angeles in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Lake Los Angeles.

Maximum UV Index Levels in Lake Los Angeles for September

The chart shows the monthly maximum UV Index (UVI) for Lake 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 Lake Los Angeles typically reaches 10, which falls under the very high exposure category.

Data source: Lake 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 Lake Los Angeles Compares to Other Months

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

This table compares monthly weather conditions in Lake 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	8°C (46°F)	56 mm (2.2 inches)	78%	moderate
February Weather	8°C (48°F)	53 mm (2.1 inches)	82%	high
March Weather	10°C (51°F)	68 mm (2.7 inches)	75%	very high
April Weather	15°C (58°F)	21 mm (0.8 inches)	68%	very high
May Weather	17°C (63°F)	15 mm (0.6 inches)	57%	extreme
June Weather	23°C (74°F)	6 mm (0.2 inches)	52%	extreme
July Weather	26°C (79°F)	11 mm (0.4 inches)	46%	extreme
August Weather	26°C (79°F)	16 mm (0.6 inches)	39%	extreme
September Weather	23°C (73°F)	7 mm (0.3 inches)	48%	very high
October Weather	17°C (63°F)	6 mm (0.3 inches)	59%	high
November Weather	13°C (55°F)	20 mm (0.8 inches)	72%	moderate
December Weather	8°C (46°F)	65 mm (2.6 inches)	76%	moderate