San Antonio, Texas weather in April

Averages from 2021–2025 (150 days of record).

Average high: 83°F
Average low: 63°F
Rainy days: ~13 per month
Total precipitation: 3.8 in
Warmest recorded: 98°F
Coldest recorded: 42°F

Expect April days in San Antonio, Texas to top out around 83°F and cool to about 63°F overnight, with roughly 13 days of measurable rain across the month. In recent years April has ranged from 42°F to 98°F.

Other months

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Current San Antonio, Texas forecast → · Historical data by Open-Meteo (ERA5).