Temperature for December 2010
In December 2010 the average high temperature in Washington, DC was 41.7°F, and this was 6.4°F cooler than the average of 48.1°F. The hottest day in December 2010 was 1 December when the temperature reached 64.9°F. Overnight the average temperature in December is 32.2°F and in 2010 the average overnight temperature was 4.4°F cooler at 27.8°F.