San Jose, California weather in April

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

Average high: 70°F
Average low: 48°F
Rainy days: ~3 per month
Total precipitation: 0.8 in
Warmest recorded: 96°F
Coldest recorded: 35°F

Expect April days in San Jose, California to top out around 70°F and cool to about 48°F overnight, with roughly 3 days of measurable rain across the month. In recent years April has ranged from 35°F to 96°F.

Other months

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