Seattle Weather In May

The record high temperature in Seattle for the last 66 years in May was 92 degrees Fahrenheit, measured on May 20, 1963, and the typical high is 64. The lowest documented temperature in May for Seattle for the past 66 years was 35 on May 26, 1954, and the regular low is 47.

United States National Weather Service historical Seattle May Weather data shows that on May 4, 1961, the high temperature did not exceed 50 degrees Fahrenheit, the lowest high measured in Seattle in the past 66 years. NWS data also shows that on May 27, 1972, the lowest measured temperature on that day did not drop below 63 degrees, the highest low temperature measured in Seattle in the last 66 years.

National Weather Service records indicate that the high temperature in Seattle on May First averages 59 degrees and the high on the last day of the month averages 67 degrees. The daily low temperature in Seattle on May First averages 45 degrees Fahrenheit and the low on the last day of May averages 51 degrees.

Seattle usually receives an average of 1.78 inches of rain during May. The most precipitation measured in a single day, as indicated by May Seattle Weather data, was 0.76 inches on May 25, 1968.