Los Angeles, California weather in September

Averages from 2021–2025 (150 days of record).

Average high: 87°F
Average low: 64°F
Rainy days: ~2 per month
Total precipitation: 0.9 in
Warmest recorded: 114°F
Coldest recorded: 55°F

Expect September days in Los Angeles, California to top out around 87°F and cool to about 64°F overnight, with roughly 2 days of measurable rain across the month. In recent years September has ranged from 55°F to 114°F.

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Current Los Angeles, California forecast → · Historical data by Open-Meteo (ERA5).