San Antonio, TX Climate in December

Temperature for December

In San Antonio, TX during December the average high temperature is 65.0°F. The hottest day on record was December 25, 1955 when the temperature hit 90.3°F.

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

Low Temperature

During December the overnight temperature drops to an average of 44.6°F, with the lowest temperature of 8.2°F being recorded on December 23, 1989. On average there are 2 days in December when the temperature stays below freezing all day. In the worst December there were 2 days when the temperature did not make it above freezing. Overnight temperatures drop below freezing between 1 and 12 times in December.

Precipitation for December

In December the average monthly rainfall in San Antonio, TX is 0.92 inches with rain usually falling on between 10 and 11 days. 1939 was the driest December with only 0.00 inches of rain falling, and 1991 was the wettest December with 10.24 inches of rain. The wettest single day in December was 23 December 1986 when 4.29 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.