Walla Walla Weather In May
In the last 60 years the highest measured temperature in Walla Walla Washington for May was 100 degrees Fahrenheit, most recently registered on May 28, 1983, while the normal high temperature is 72. The record low May temperature in Walla Walla for the last 60 years was 26 most recently measured on May 28, 1954, and the mean daily low in the month is 48.
US National Weather Service historical Walla Walla May Weather data records that on May 1, 1959, the high temperature did not exceed 47 degrees Fahrenheit, the lowest high measured in Walla Walla in the past 60 years. The Weather Service additionally indicates that on May 31, 1986, the low for the day did not drop below 69 degrees, the highest low recorded in Walla Walla in the last 60 years.
Historical weather data accumulated by the National Weather Service shows that the average daily high temperature in Walla Walla on May First is 66 degrees Fahrenheit and the average high on the last day of May is 74 degrees. The daily low temperature in Walla Walla on May First averages 44 degrees Fahrenheit and the low on the last day of May averages 50 degrees.
Walla Walla usually receives an average of 1.95 inches of rain during May. The most rain recorded in a single day, as shown by May Walla Walla Weather data, was 1.7 inches on May 26, 1971.