San Antonio, TX Climate in December

Temperature for December

In San Antonio, TX during December the average high temperature is 66.0°F. The hottest day on record was December 25, 1955 when the temperature hit 90.0°F.

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

Low Temperature

During December the overnight temperature drops to an average of 42.4°F, with the lowest temperature of 6.1°F being recorded on December 24, 1989. On average there are 1 days in December when the temperature stays below freezing all day. Overnight temperatures drop below freezing between 1 and 17 times in December.

Precipitation for December

In December the average monthly rainfall in San Antonio, TX is 1.11 inches with rain usually falling on between 10 and 11 days. 1947 was the driest December with only 0.00 inches of rain falling, and 1991 was the wettest December with 14.60 inches of rain. The wettest single day in December was 19 December 1991 when 6.28 inches of rain fell.

In December it usually snows on between 0 and 1 days. In December there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in December.