Averages from 2021–2025 (155 days of record).
Expect January days in Fresno, California to top out around 58°F and cool to about 39°F overnight, with roughly 7 days of measurable rain across the month. In recent years January has ranged from 29°F to 72°F.
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Current Fresno, California forecast → · Historical data by Open-Meteo (ERA5).