Los Angeles, CA weather in September
Expect warm, dry weather in Los Angeles in September, with highs near 83°F and lows near 64°F. Rain is rare. It is one of the warmest months in Los Angeles.
- Normal high
- 83°F
- Normal low
- 64°F
- Wet days
- 0
- 0.1 in total
- Muggy days
- 2
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 85°F | 81°F |
| Normal low | 65°F | 63°F |
| Chance of a wet day | 1% | 3% |
| Sunrise / sunset | 6:26 am / 7:19 pm | 6:46 am / 6:39 pm |
| Daylight | 12.9 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical September day
- 6 am65°Fdew point 60°F
- 9 am72°Fdew point 60°F
- Noon74°Fdew point 60°F
- 3 pm73°Fdew point 60°F
- 6 pm68°Fdew point 60°F
- 9 pm67°Fdew point 60°F
NOAA hourly normals (local standard time) from Los Angeles Intl Airport (12 mi away); average wind 7 mph; clear or few clouds in 53% of daytime hours, mostly cloudy or overcast in 24%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F7 of 30
- Hot dayshigh 90°F or more6 of 30
- Muggy daysdaily mean dew point 65°F or more2 of 30
- Wet daysat least 0.01 in of rain or melted snow0 of 30
- Notable rainat least 0.10 in0 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 0.1 in; a dry September brings about 0.0 in and a wet one about 0.03 in (25th and 75th percentiles). Days with half an inch or more are rare.
How September varies from year to year
- Warmest September, 1991-20201997: average high 89°F
- Coolest September1999: average high 78°F
- Wettest September2015: 2.4 in
- Driest September1992: no measurable precipitation
- Highest reading113°F (September 27, 2010)
- Lowest reading55°F (September 23, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 84°F | 83°F | 79°F |
| Normal low | 65°F | 64°F | 60°F |
| Wet days | 0 | 0 | 2 |
| Comfortable days | 5 | 7 | 16 |
| Daylight | 13.4 h | 12.4 h | 11.3 h |
Highs change by -1°F from August and -4°F into October.
Nearby alternatives in September
- Warmer: Pasadena, CA9 mi · high 90°F · 1 wet day
- Cooler: Torrance, CA16 mi · high 77°F · 1 wet day
How Los Angeles ranks in September
- Normal high163rd warmest of 378 cities; 39th of 60 in California
- Wet days3rd driest of 378
- Comfortable days183rd most of 342
Heating and cooling
September has 1 heating degree days and 259 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How hot is Los Angeles in September?
The normal high is 83°F and the normal low is 64°F. From 1991 to 2020 the hottest September reading was 113°F (September 27, 2010).
Does it rain a lot in Los Angeles in September?
About 0 days in September have at least 0.01 in of precipitation, and the normal total is 0.1 in. The wettest September in 1991-2020 was in 2015 (2.4 in); the driest was in 1992, with no measurable precipitation.
Is September a good time to visit Los Angeles?
September ranks 11th of 12 months on our comfort score for Los Angeles (59 out of 100). It has about 7 comfortable days and about 6 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain and frost dates: Los Angeles Downtown Usc Campus (USW00093134), 0.5 mi E of the city center, 230 ft (54 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: U C L A (USC00049152), 12 mi W of the city center, 430 ft (146 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Los Angeles Intl Airport (USW00023174), 12 mi SW of the city center, 97 ft (187 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Los Angeles International Airport (722950-23174), 11 mi SW of the city center, 97 ft (187 ft lower than the city). Hourly observations, 1991-2020.