Los Angeles weather in September: Los Angeles, California: normal highs, lows, rain and records for September
Los Angeles in September has a normal high of 83°F and a normal low of 64°F, a daily mean of 74°F, falling from 85°F on the 1st to 81°F by the 30th. Measurable precipitation falls on 0 days in a normal September, 0.13 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 18°C, 3 mm of precipitation in September.
- NOAA stationLos Angeles Downtown USC Campus
- Station IDUSW00093134
- Location34.05°N 118.24°W
- Elevation230 ft (70 m)
- From the center10 miles
- Population3,878,704
- Jan 68° 49°
- Feb 68° 50°
- Mar 70° 52°
- Apr 72° 55°
- May 74° 58°
- Jun 77° 61°
- Jul 82° 65°
- Aug 84° 65°
- Sep 83° 64°
- Oct 79° 60°
- Nov 73° 53°
- Dec 67° 48°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Los Angeles in September?
The normal high is 83°F and the normal low 64°F, for a daily mean of 73.6°F. September is 1.1°F cooler than August and 4.3°F warmer than October. September is the 2nd warmest month of the year in Los Angeles and the 9th wettest. Across the month the normal high falls 4°F, from 85°F on September 1 to 81°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 71°F and 76°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 4%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 85°F | 65°F | 1% | 0% |
| September 8 | 84°F | 65°F | 1% | 0% |
| September 15 | 83°F | 64°F | 2% | 1% |
| September 22 | 82°F | 64°F | 2% | 1% |
| September 30 | 81°F | 63°F | 4% | 2% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 85°F | 65°F | 1% | 0% | 12 h 50 min |
| September 2 | 85°F | 65°F | 1% | 0% | 12 h 50 min |
| September 3 | 85°F | 65°F | 1% | 0% | 12 h 50 min |
| September 4 | 84°F | 65°F | 1% | 0% | 12 h 50 min |
| September 5 | 84°F | 65°F | 1% | 0% | 12 h 50 min |
| September 6 | 84°F | 65°F | 1% | 0% | 12 h 40 min |
| September 7 | 84°F | 65°F | 1% | 0% | 12 h 40 min |
| September 8 | 84°F | 65°F | 1% | 0% | 12 h 40 min |
| September 9 | 84°F | 65°F | 1% | 1% | 12 h 40 min |
| September 10 | 84°F | 65°F | 1% | 1% | 12 h 40 min |
| September 11 | 84°F | 65°F | 1% | 1% | 12 h 30 min |
| September 12 | 84°F | 65°F | 1% | 1% | 12 h 30 min |
| September 13 | 84°F | 65°F | 1% | 1% | 12 h 30 min |
| September 14 | 83°F | 65°F | 1% | 1% | 12 h 30 min |
| September 15 | 83°F | 64°F | 2% | 1% | 12 h 30 min |
| September 16 | 83°F | 64°F | 2% | 1% | 12 h 20 min |
| September 17 | 83°F | 64°F | 2% | 1% | 12 h 20 min |
| September 18 | 83°F | 64°F | 2% | 1% | 12 h 20 min |
| September 19 | 83°F | 64°F | 2% | 1% | 12 h 20 min |
| September 20 | 83°F | 64°F | 2% | 1% | 12 h 20 min |
| September 21 | 82°F | 64°F | 2% | 1% | 12 h 10 min |
| September 22 | 82°F | 64°F | 2% | 1% | 12 h 10 min |
| September 23 | 82°F | 64°F | 2% | 1% | 12 h 10 min |
| September 24 | 82°F | 63°F | 3% | 2% | 12 h 10 min |
| September 25 | 82°F | 63°F | 3% | 2% | 12 h 10 min |
| September 26 | 81°F | 63°F | 3% | 2% | 12 h |
| September 27 | 81°F | 63°F | 3% | 2% | 12 h |
| September 28 | 81°F | 63°F | 3% | 2% | 12 h |
| September 29 | 81°F | 63°F | 3% | 2% | 12 h |
| September 30 | 81°F | 63°F | 4% | 2% | 11 h 50 min |
- Normal high
- 83°FSeptember average
- Normal low
- 64°FSeptember average
- Precipitation
- 0.13 inmonth total
- Days with precipitation
- fewer than 10.01 inch or more
- Days at 90°F or more
- 6
- Daylight
- 12 h 50 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 21
- Sunshine
- 95%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093134; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Los Angeles in September?
On a given September day the chance of 0.01 inch or more is 2% on average, highest around September 30 (4%). In all, 0.13 in falls on 0 days of a normal September.
In a normal September in Los Angeles, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093134.
What are the records for September in Los Angeles?
The warmest September temperature on this station's record (since 1877) is 113°F, on September 27, 2010; the coldest is 44°F, on September 29, 1880. The wettest September brought 5.67 in (1939).
The September mean against the 1991-2020 normal of 73.6°F: 2021 71.3°F (−2.3), 2022 77.5°F (+3.9), 2023 72.4°F (−1.2), 2024 73.5°F (−0.1), 2025 74.9°F (+1.3), 2026 76.4°F (+2.8). 3 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.3°F | −2.3°F | 0.01 in |
| 2022 | 77.5°F | +3.9°F | 0.37 in |
| 2023 | 72.4°F | −1.2°F | 0.05 in |
| 2024 | 73.5°F | −0.1°F | 0.00 in |
| 2025 | 74.9°F | +1.3°F | 0.09 in |
| 2026 | 76.4°F | +2.8°F | 0.75 in |
Source: records: ACIS, station USW00093134; recent months: ACIS, station USW00093134. Records and recent months use complete months only.
How does September in Los Angeles compare across California?
Across the 219 places PlainClimate covers in California, September normal highs run from 64°F in Eureka to 104°F in Brawley; Los Angeles's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Los Angeles in August84°F by day, 65°F at night
- Los Angeles in October79°F by day, 60°F at night
- Los Angeles through the yearEvery month, frost dates, records and recent years
- California in SeptemberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Septembernormal high 104°F