Los Angeles County (Los Angeles)
September
Weather in Los Angeles County, California for September 2026
Your guide to Los Angeles County weather in September - trends and predictions
So far, September 2026 in Los Angeles County is slightly warmer than the historical average by 0.9 °F.
The forecast for the upcoming days in Los Angeles County predicts a temperature of 31.5 °F, which is slightly above the historical average.
In general, the average temperature in Los Angeles County at the beginning of September is 32.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 30.9 °F by the end of September.
Precipitation in Los Angeles County during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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29
Dry days
1
Rainy days
0
Snow days
28°/19°
Temperatures
16 km/h
Avg max wind
58 %
Avg humidity
Los Angeles County Weather September
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Temperatures trend during September in Los Angeles County
See the weather trend as well as the moving average line
September weather in Los Angeles County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 30° /19° | 0 mm | 8 | |
| Sept. 2 | Sunny | 31° /20° | 0 mm | 8 | |
| Sept. 3 | Sunny | 32° /20° | 0 mm | 8 | |
| Sept. 4 | Sunny | 32° /20° | 0.1 mm | 8 | |
| Sept. 5 | Sunny | 34° /20° | 0 mm | 9 | |
| Sept. 6 | Sunny | 32° /21° | 1 mm | 7 | |
| Sept. 7 | Sunny | 34° /21° | 0.3 mm | 7 | |
| Sept. 8 | Sunny | 35° /22° | 0 mm | 8 | |
| Sept. 9 | Sunny | 35° /23° | 2.1 mm | 7 | |
| Sept. 10 | Sunny | 31° /21° | 0.2 mm | 7 | |
| Sept. 11 | Sunny | 30° /21° | 0.1 mm | 7 | |
| Sept. 12 | Sunny | 29° /20° | 0.2 mm | 7 | |
| Sept. 13 |  Cloudy | 28° /19° | 0 mm | 7 | |
| Sept. 14 | Sunny | 28° /18° | 0 mm | 7 | |
| Sept. 15 | Sunny | 28° /18° | 0 mm | 7 | |
| Sept. 16 | Sunny | 27° /18° | 0 mm | 7 | |
| Sept. 17 | Sunny | 26° /17° | 0 mm | 7 | |
| Sept. 18 | Sunny | 26° /17° | 3.8 mm | 6 | |
| Sept. 19 | Sunny | 25° /17° | 0 mm | 6 | |
| Sept. 20 |  Overcast | 26° /17° | 0 mm | 6 | |
| Sept. 21 | Sunny | 25° /20° | 0 mm | 6.8 | |
| Sept. 22 | Sunny | 27° /19° | 0 mm | 7.4 | |
| Sept. 23 | Sunny | 30° /21° | 0 mm | 7.4 | |
| Sept. 24 | Sunny | 30° /22° | 0 mm | 7.2 | |
| Sept. 25 | Sunny | 31° /22° | 0 mm | 7.4 | |
| Sept. 26 | Overcast | 32° /23° | 0 mm | 7 | |
| Sept. 27 | Sunny | 29° /23° | 0 mm | 7 | |
| Sept. 28 | Sunny | 30° /22° | 0 mm | 8 | |
| Sept. 29 | Sunny | 32° /24° | 0 mm | 8 | |
| Sept. 30 | Sunny | 32° /23° | 0 mm | 8 | |
| Next | |||||
Important Notice
Our weather forecast for Los Angeles County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Los Angeles County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Los Angeles County in September - FAQ
What are the expected maximum and minimum temperatures in Los Angeles County during September?
During September, expect a variety of temperatures with highs around 28° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in Los Angeles County during September?
Rainfall in Los Angeles County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Los Angeles County during September?
The average wind speed in Los Angeles County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Los Angeles County
Explore the daily rainfall trends and prepare for Los Angeles Countys September weather 💧
Typically, Los Angeles County has 1 rainy days in September with a total of 8.3 mm of rainfall.
UV exposure in Los Angeles County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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