Seattle, WA weather in September 1990

Temperature for September 1990

In September 1990 the average high temperature in Seattle, WA was 75.1°F, and this was 3.6°F warmer than the average of 71.5°F. The hottest day in September 1990 was 23 September when the temperature reached 91.9°F. Overnight the average temperature in September is 51.3°F and in 1990 the average overnight temperature was 1.7°F warmer at 53.0°F.

Precipitation for September 1990

In September the average monthly rainfall in Seattle, WA is 1.89 inches with rain usually falling on 10 days. In September 1990 there was a total of 0.09 inches of rain, that fell on 6 days.