Temperature for December 1990
In December 1990 the average high temperature in Seattle, WA was 41.3°F, and this was 5.3°F cooler than the average of 46.6°F. The hottest day in December 1990 was 5 December when the temperature reached 53.1°F. Overnight the average temperature in December is 35.6°F and in 1990 the average overnight temperature was 6.7°F cooler at 28.9°F.