March in San Antonio averages a daily high of 23.5°C with nights around 10.4°C. Expect roughly 8.8 wet days totalling 57mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit San Antonio is February–April.
Based on SAN ANTONIO INCARNATE WORD, TX US (5.5km), 1995–2024. 21 years of March data.