San Antonio weather in March
March in San Antonio: warm, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in San Antonio · #36 of 604 destinations to visit in March · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
San Antonio climate normals — March
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 46 mm / 1.8 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 57% | 🍃 comfortable |
| Dew point | 8°C / 46°F | |
| Sunshine | 7.8 h/day | |
| Daylight | 12 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Antonio in March — FAQ
- Is March a good time to visit San Antonio?
- March in San Antonio: warm, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for San Antonio on SeasonMap's comfort score (91/100).
- What is the weather like in San Antonio in March?
- In March, San Antonio averages a daily high of 24.9°C and a low of 13.3°C, with about 46.2 mm of rain over roughly 8 rainy days.
- What is the air quality in San Antonio in March?
- San Antonio has a mean US Air Quality Index of about 40 in March.