Los Angeles
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Los Angeles, CA

A beautiful view of the detailed layout of Los Angeles in California at dusk
A beautiful view of the detailed layout of Los Angeles in California at dusk
September marks the start of the autumn and has alternate hot and mild days. Highs often touch the 90°F (32.2°C), but the average daily high is 83°F (28.3°C).
The summer crowds disperse by September, and the fall weather is an excellent time to visit Los Angeles with the absence of rain and great vacation deals. The Emmy Awards is another popular attraction for television lovers in the lovely fall weather.
September is usually a good time to walk in light clothes.

What is the temperature in September in Los Angeles?

In September, in Los Angeles, the average high-temperature is 83.1°F (28.4°C), and the average low-temperature is 63.1°F (17.3°C).

What is the average humidity in September in Los Angeles?

In September, the average relative humidity in Los Angeles, California, is 74.2%.

How many days does it rain in September in Los Angeles?

In September, in Los Angeles, the rain falls for 1 days. Throughout September, 0.4" (9mm) of precipitation is accumulated.

How many hours of daylight does Los Angeles have in September?

In September, the average length of the day in Los Angeles is 12.4h.

How long on average sun shines in September in Los Angeles?

The average sunshine in September is 9.3h.

How high is the UV index in September in Los Angeles?

The average daily maximum UV index in September in Los Angeles is 8. A UV Index estimate of 8 to 10 represents a very high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Los Angeles, CA
  • Average high temperature in September: 83.1°F

The warmest month (with the highest average high temperature) is August (84.4°F).
The month with the lowest average high temperature is December (67.7°F).

  • Average low temperature in September: 63.1°F

The month with the highest average low temperature is August (64.1°F).
The coldest month (with the lowest average low temperature) is December (47.5°F).

Average humidity in September - Los Angeles, CA
  • Average humidity in September: 74.2%

Months with the highest relative humidity are July and August (76.6%).
The month with the lowest relative humidity is December (62.9%).

Average rainfall in September - Los Angeles, CA
  • Average rainfall in September: 0.4"

Wettest months (with the highest rainfall) are January and February (3.1").
Driest months (with the lowest rainfall) are June and July (0").

Average rainfall days in September - Los Angeles, CA
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is February (6.4 days).
Months with the lowest number of rainy days are July and August (0.3 days).

Average daylight in September / Average sunshine in September - Los Angeles, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.3h

The month with most sunshine is July (Average sunshine: 11.7h).
The month with least sunshine is December (Average sunshine: 7.1h).

Average UV index in September - Los Angeles, CA
  • Average UV index in September: 8

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 3).