Temperature for December 1977
In December 1977 the average high temperature in San Antonio, TX was 68.6°F, and this was 2.9°F warmer than the average of 65.7°F. The hottest day in December 1977 was 5 December when the temperature reached 86.0°F. Overnight the average temperature in December is 44.7°F and in 1977 the average overnight temperature was 2.1°F cooler at 42.6°F.