San Antonio Weather in April

During April, San Antonio, Texas enjoys mainly dry weather. It can get hot, but excessive heat is normally not encountered this time of year.

This page gives detailed information on the typical April weather for San Antonio.

You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered at the San Antonio International Airport, located a few miles north of the city center.

Temperature Weather iconTemperature

81 °F April average high 27 °C
58 °F April average low 15 °C

In most years, San Antonio averages a daily maximum temperature for April that's between 78 and 83 degrees Fahrenheit (25 to 29 degrees Celsius). The minimum temperature usually falls between 55 and 62 °F (13 to 16 °C).

The days at San Antonio warm steadily during April. By the end of the month, the temperature has climbed around 6 °F (3 °C) above what it was at the start.

17 days 80 °F max. or more (27 °C)
16 days 60 °F min. or less (16 °C)

The temperature rises nearly every day during April to over 70 °F (21 °C) in San Antonio. The city averages 2 days this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures above 100 °F (38 °C) are not expected here during April.

The thermometer dips to 40 °F (4 °C) or below on an average of 1 night. In most years April does not get as cold as freezing.

Rainy Weather iconRain

2.1 in total precipitation 53 mm
6 days of rain

Half the time, San Antonio receives 1 to 3 inches (23 to 83 mm) of rainfall in April. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

56 % sunshine
7 days clear skies

The sun's rays reach the ground in San Antonio during 56 percent of daylight hours on average in April, for a total of 217 hours in the month. Typically on 7 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in April at San Antonio lasts for 12 hours and 53 minutes a day on average. The shortest day of the month is the 1st with 12 hours and 29 minutes of daylight. By the end of the month, the days have lengthened to 13:17 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

66 % April average humidity

The relative humidity in San Antonio during April usually peaks at 83 percent in the morning then drops to 49 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 75 80 83 72 57 49 50 65

Windy Weather iconWind

10.1 mph April wind speed average 16.3 kph

April is one of the windiest months in San Antonio.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
4 days with thunderstorms in April

These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.

San Antonio Weather
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