San Diego weather in July
July in San Diego: warm, dry, with very humid — one of the best months to visit.
#2 of 12 months in San Diego · #83 of 604 destinations to visit in July · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
San Diego climate normals — July
| Daytime high | 25°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 1 mm / 0 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 17°C / 62°F | |
| Sunshine | 13.1 h/day | |
| Daylight | 14.1 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Diego in July — FAQ
- Is July a good time to visit San Diego?
- July in San Diego: warm, dry, with very humid — one of the best months to visit. It ranks #2 of 12 months for San Diego on SeasonMap's comfort score (90/100).
- What is the weather like in San Diego in July?
- In July, San Diego averages a daily high of 24.7°C and a low of 17.5°C, with about 0.7 mm of rain over roughly 0.2 rainy days.
- What is the air quality in San Diego in July?
- San Diego has a mean US Air Quality Index of about 51 in July.