Temperature for December 2012
In December 2012 the average high temperature in San Antonio, TX was 69.5°F, and this was 3.9°F warmer than the average of 65.7°F. The hottest day in December 2012 was 19 December when the temperature reached 82.6°F. Overnight the average temperature in December is 44.7°F and in 2012 the average overnight temperature was 1.6°F warmer at 46.2°F.