San Diego, California weather in October

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

Average high: 74°F
Average low: 58°F
Rainy days: ~3 per month
Total precipitation: 0.7 in
Warmest recorded: 90°F
Coldest recorded: 47°F

Expect October days in San Diego, California to top out around 74°F and cool to about 58°F overnight, with roughly 3 days of measurable rain across the month. In recent years October has ranged from 47°F to 90°F.

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