San Antonio, TX Climate in May

Temperature for May

In San Antonio, TX during May the average high temperature is 86.1°F. The hottest day on record was May 24, 1955 when the temperature hit 101.3°F.

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

Low Temperature

During May the overnight temperature drops to an average of 66.4°F, with the lowest temperature of 42.1°F being recorded on May 9, 1984. In May it has never frozen overnight.

Precipitation for May

In May the average monthly rainfall in San Antonio, TX is 2.02 inches with rain usually falling on between 11 and 12 days. 1939 was the driest May with only 0.00 inches of rain falling, and 1987 was the wettest May with 9.70 inches of rain. The wettest single day in May was 20 May 1987 when 3.46 inches of rain fell.

In May it usually snows on between 0 and 1 days. There are thunderstorms on between 5 and 6 days in May.