San Antonio, TX Climate in August

Temperature for August

In San Antonio, TX during August the average high temperature is 95.8°F. The hottest day on record was August 28, 2011 when the temperature hit 110.1°F.

San Antonio, TX daily average and extreme temperature range for August

Low Temperature

During August the overnight temperature drops to an average of 74.6°F, with the lowest temperature of 59.9°F being recorded on August 29, 1992. In August it has never frozen overnight.

Precipitation for August

In August the average monthly rainfall in San Antonio, TX is 1.25 inches with rain usually falling on between 6 and 7 days. 1938 was the driest August with only 0.00 inches of rain falling, and 1974 was the wettest August with 15.05 inches of rain. The wettest single day in August was 19 August 2012 when 4.58 inches of rain fell.

There are thunderstorms on between 3 and 4 days in August.