Last updated: June 24, 2025
In April, the average temperature in San Antonio, United States is a pleasant 23°C (73°F). Expect a range from a cool 7°C (45°F) to a warm 36°C (96°F), making it ideal for varying outdoor activities. However, be prepared for some rain, as 77 mm (3.0 in) of precipitation is anticipated over 8 days. The average humidity level sits at a comfortable 70%, providing a refreshing experience throughout the month!
In April in San Antonio, the average temperature is 23°C (73°F). Maximum temperatures can reach 36°C (96°F), while the minimum can drop to as low as 7°C (45°F). This pleasant climate makes San Antonio an ideal destination for travelers seeking a comfortable getaway.
In San Antonio in April, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.
In San Antonio in April humidity is 70%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace that can lead to a feeling of lethargy while traveling, making it essential to stay hydrated and take breaks in shaded areas.
In San Antonio in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Antonio.
UV Risk Categories
Weather in San Antonio varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in San Antonio, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (60°F) | 43 mm (1.7 inches) | 83% | high |
| February Weather | 19°C (66°F) | 69 mm (2.7 inches) | 80% | very high |
| March Weather | 20°C (68°F) | 20 mm (0.8 inches) | 75% | very high |
| April Weather | 23°C (73°F) | 77 mm (3.0 inches) | 70% | extreme |
| May Weather | 25°C (78°F) | 123 mm (4.8 inches) | 68% | extreme |
| June Weather | 27°C (81°F) | 223 mm (8.8 inches) | 75% | extreme |
| July Weather | 27°C (81°F) | 276 mm (10.8 inches) | 79% | extreme |
| August Weather | 28°C (82°F) | 247 mm (9.7 inches) | 81% | extreme |
| September Weather | 27°C (81°F) | 189 mm (7.4 inches) | 83% | extreme |
| October Weather | 25°C (77°F) | 82 mm (3.2 inches) | 81% | very high |
| November Weather | 20°C (68°F) | 49 mm (1.9 inches) | 82% | high |
| December Weather | 17°C (64°F) | 70 mm (2.8 inches) | 84% | moderate |