Temperature for December 2010
In December 2010 the average high temperature in San Antonio, TX was 68.0°F, and this was 2.3°F warmer than the average of 65.7°F. The hottest day in December 2010 was 4 December when the temperature reached 80.6°F. Overnight the average temperature in December is 44.7°F and in 2010 the average overnight temperature was 3.5°F cooler at 41.1°F.