San Diego weather in April
April in San Diego: nice, dry — an excellent time to visit.
#7 of 12 months in San Diego · #247 of 604 destinations to visit in April · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
San Diego climate normals — April
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 23 mm / 0.9 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 11.2 h/day | |
| Daylight | 13 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 64 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Diego in April — FAQ
- Is April a good time to visit San Diego?
- April in San Diego: nice, dry — an excellent time to visit. It ranks #7 of 12 months for San Diego on SeasonMap's comfort score (82/100).
- What is the weather like in San Diego in April?
- In April, San Diego averages a daily high of 19.5°C and a low of 12.3°C, with about 22.8 mm of rain over roughly 3.6 rainy days.
- What is the air quality in San Diego in April?
- San Diego has a mean US Air Quality Index of about 64 in April.