San Diego weather in March
March in San Diego: nice, a little rain, with very humid — a great time to visit.
#9 of 12 months in San Diego · #326 of 604 destinations to visit in March · comfort 74/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
San Diego climate normals — March
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 76 mm / 3 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 12 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 59 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Diego in March — FAQ
- Is March a good time to visit San Diego?
- March in San Diego: nice, a little rain, with very humid — a great time to visit. It ranks #9 of 12 months for San Diego on SeasonMap's comfort score (74/100).
- What is the weather like in San Diego in March?
- In March, San Diego averages a daily high of 17.2°C and a low of 10°C, with about 75.5 mm of rain over roughly 10.6 rainy days.
- What is the air quality in San Diego in March?
- San Diego has a mean US Air Quality Index of about 59 in March.