San Jose, California weather in October

Averages from 2021–2025 (155 days of record).

Average high: 77°F
Average low: 55°F
Rainy days: ~3 per month
Total precipitation: 1.3 in
Warmest recorded: 107°F
Coldest recorded: 41°F

Expect October days in San Jose, California to top out around 77°F and cool to about 55°F overnight, with roughly 3 days of measurable rain across the month. In recent years October has ranged from 41°F to 107°F.

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