Weather in San Antonio in April
April in San Antonio is mild with average temperatures around 21.5°C (70.7°F). Moderate rainfall of 62mm spread over 6 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
28.4°C
83.1°F
Low
14.6°C
58.3°F
Precipitation
62 mm
2.5 inches
~6 rainy days
Conditions
Humidity
66%
Comparison to Adjacent Months
April is 4.2°C warmer than March.
April is 3.8°C cooler than May, 37mm drier than May.