San Diego, California weather in April

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

Average high: 66°F
Average low: 53°F
Rainy days: ~3 per month
Total precipitation: 0.3 in
Warmest recorded: 91°F
Coldest recorded: 43°F

Expect April days in San Diego, California to top out around 66°F and cool to about 53°F overnight, with roughly 3 days of measurable rain across the month. In recent years April has ranged from 43°F to 91°F.

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