Fresno, California weather in September

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

Average high: 94°F
Average low: 66°F
Rainy days: ~1 per month
Total precipitation: 0.2 in
Warmest recorded: 117°F
Coldest recorded: 55°F

Expect September days in Fresno, California to top out around 94°F and cool to about 66°F overnight, with roughly 1 days of measurable rain across the month. In recent years September has ranged from 55°F to 117°F.

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