Seattle, WA Climate in August

Temperature for August

In Seattle, WA during August the average high temperature is 76.7°F. The hottest day on record was August 9, 1960 when the temperature hit 99.3°F.

Seattle, WA daily average and extreme temperature range for August

Low Temperature

During August the overnight temperature drops to an average of 54.7°F, with the lowest temperature of 44.1°F being recorded on August 4, 1950. In August it has never frozen overnight.

Precipitation for August

In August the average monthly rainfall in Seattle, WA is 1.12 inches with rain usually falling on between 8 and 9 days. 2012 was the driest August with only 0.00 inches of rain falling, and 1975 was the wettest August with 4.82 inches of rain. The wettest single day in August was 14 August 1968 when 1.61 inches of rain fell.

In August it usually snows on between 0 and 1 days. In August there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in August.