San Antonio, Texas Weather in March

Mild days outdoors

March feels like spring in San Antonio. Afternoons reach about 25°C, while mornings and evenings can cool to around 11°C. Rain falls on about seven days, so a shower may interrupt a walk, but it rarely defines the whole month.

It's a good time for the River Walk, the Alamo and outdoor areas at San Antonio Missions National Historical Park. You can enjoy longer walks without April's warmer afternoons. Save indoor stops, such as the Witte Museum, for a rainy spell. Families who want time outside without summer heat may find March especially comfortable.

Spring break and crowds

Spring break brings more families and visitors, especially around the River Walk, the Alamo and downtown hotels. Crowds and prices can rise compared with quieter winter weeks, though March isn't the peak summer season. San Antonio's famous Fiesta takes place in April, not March, so don't expect its full parade schedule yet.

St Patrick's Day celebrations can include the River Walk's green river dyeing and festivities. Dates and event details can vary by year, so check the official San Antonio River Walk calendar before making a special trip.

Make room for showers

With around 56 mm of rain across the month, a wet day is possible, and clouds can soften the sunshine. Keep a flexible plan rather than setting aside every day for outdoor sightseeing. The San Antonio Missions trail links several historic mission sites; after rain, shorter visits may feel better than cycling the full route.

For a River Walk visit, use the street-level entrances near the Alamo if rain makes the lower paths slippery. You can still enjoy the river from a nearby café, then return to the walkway when conditions improve.