What is the Weather in September in Los Angeles

Updated: 11 marzo 2024
 By Mel

This post is an overview of the September weather in Los Angeles, including snow and precipitation forecasts, as well as tips on how to dress and things to do. Be sure to look into what August and October is like in LA, as well!


Summer weather continues to prevail in Los Angeles during September with warm afternoons and mostly comfortable evenings and mornings, although a couple of cooler days can be expected near the end to the month.

Afternoon high temperatures tend to be in the mid-80s F (28-29 C) early in the month but fall into the lower 80s F (about 27 C) near the end of the month.

A few of the warmer afternoons, especially early in the month, will reach into the low to mid 90s F (33-34 C).

Average Temperatures in LA in September?

You should expect 5-6 days this month when high temperatures reach or exceed 90 F (about 32 C) with highs of 100 F (about 38 C) or more occurring once every 2-3 years.

The record high temperature in Los Angeles during September is 113F (45.0 C).

Late night and early morning low temperatures tend to be in the mid-60s F (18-19 C) early in September falling into the low to mid 60s F (about 17 C) towards the end of the month.

A few of the cooler mornings, late in the month, can dip down into the upper 50s F (14-15 C). The record low temperature in Los Angeles during September is 47 F (8.3 C). 


Skies during September tend to be clear or at least partly sunny on about 24-27 days with measurable rainfall limited to 1 day on average, usually near the end of the month.

Significant rainfalls of 0.5 inches (about 13 mm) or more only occur about once each decade.

How Much Sunshine in LA in September?

Humidity levels during September tend to range from comfortable to humid with 1 day on average considered to be muggy.

Daylight hours continue to decrease during September from just under 13 hours early in the month to just under 12 hours near the end of the month.


The weather during September is warm and dry so summer attire will due throughout this month.

What to Wear in LA in September

You might want to bring along a sweater for those few cooler evenings and mornings, especially near the end of the month.

There will be plenty of sunshine so you should also have a good pair of sunglasses and sunscreen handy. Please also don’t forget a good pair of walking shoes.


Below are top things to do in September in Los Angeles.

Be sure to read our full post on what to do in Los Angeles this month which includes free things to do, night and family-friendly activities and attractions, as well as our definitive post on the best things to do in LA.

And if you are planning on visiting many of Los Angeles’s top attractions, then you should consider a tourist discount pass as you could save up to 50% of retail ticket prices to tours, attractions, and restaurants.

City Passes Los Angeles
  1. HB Civil War Days
  2. Fiesta Hermosa
  3. LA Fleet Week
  4. Vino-Palooza
  5. Santa Monica Classic
  6. Taco Takeover
  7. TarFest
  8. LA Film Fest
  9. Look into a Tourist Discount Pass
  10. Take a Walking Tour

Be sure to check out all the top things to do in September in our main post.

Seasonal Outlook

July to September 2024 Los Angeles

There is a 73% chance for normal to above normal temperatures with near normal rainfall.

Fred Pickhardt
Ocean Weather Services

About The Author


Mel loves to be a tourist in her own city. With a background in performing arts, tourism, and photography, giving tours and being a story-teller comes naturally to her. She loves traveling, food, and theatre. Mel splits her time between Chicago and Los Angeles (#theatrelife) and leads tours and manages both cities!
Updated: marzo 11th, 2024
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