Temperature for August
In San Antonio, TX during August the average high temperature is 95.4°F. The hottest day on record was August 29, 2011 when the temperature hit 109.9°F.
Precipitation for August
In August the average monthly rainfall in San Antonio, TX is 1.36 inches with rain usually falling on between 5 and 6 days. 1947 was the driest August with only 0.00 inches of rain falling, and 1974 was the wettest August with 14.81 inches of rain. The wettest single day in August was 17 August 2007 when 5.77 inches of rain fell.
In August it usually snows on between 0 and 1 days. Tornados are reported on 0 and 1 days in August. There are thunderstorms on between 3 and 4 days in August.