April in San Antonio averages a daily high of 27.1°C with nights around 14.1°C. Expect roughly 6.4 wet days totalling 49.7mm. 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 April data.