San Diego weather in October
October in San Diego: warm, dry, with very humid — an excellent time to visit.
#5 of 12 months in San Diego · #135 of 604 destinations to visit in October · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
San Diego climate normals — October
| Daytime high | 24°C / 75°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 9 mm / 0.3 in | ☀️ dry |
| Rainy days | 2 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 15°C / 59°F | |
| Sunshine | 10.2 h/day | |
| Daylight | 11.4 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 63 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Diego in October — FAQ
- Is October a good time to visit San Diego?
- October in San Diego: warm, dry, with very humid — an excellent time to visit. It ranks #5 of 12 months for San Diego on SeasonMap's comfort score (86/100).
- What is the weather like in San Diego in October?
- In October, San Diego averages a daily high of 24.1°C and a low of 15.8°C, with about 8.7 mm of rain over roughly 2 rainy days.
- What is the air quality in San Diego in October?
- San Diego has a mean US Air Quality Index of about 63 in October.