Fall in Los Angeles
Los Angeles Weather in September
On average, Los Angeles sees a top of 28°C and an overnight low of 18°C in September, with around 1 rain days and 4mm of total rainfall. UV is typically very high, 8-9.
28°C
18°C
4mm
1
What September is like in Los Angeles
Often the year's hottest spells arrive now, driven by dry, gusty Santa Ana winds. These offshore winds also mark the peak of fire weather across the region.
These figures are long-term averages, not a forecast — for today's actual conditions and the week ahead, check the live Los Angeles weather forecast. Averages are useful for planning travel, events or what to pack, but any single September can run warmer, cooler, wetter or drier than the long-term normal.