Seattle, WA Climate in May

Temperature for May

In Seattle, WA during May the average high temperature is 65.7°F. The hottest day on record was May 21, 1963 when the temperature hit 93.4°F.

Seattle, WA daily average and extreme temperature range for May

Low Temperature

During May the overnight temperature drops to an average of 46.1°F, with the lowest temperature of 28.4°F being recorded on May 1, 1954. Overnight temperatures drop below freezing 1 times in May.

Precipitation for May

In May the average monthly rainfall in Seattle, WA is 2.15 inches with rain usually falling on between 14 and 15 days. 1998 was the driest May with only 0.10 inches of rain falling, and 1973 was the wettest May with 19.18 inches of rain. The wettest single day in May was 15 May 1973 when 6.30 inches of rain fell.

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