This chart will show how many times it has rained in Seattle on any given day over the past 122 years.
Period of record: Jan. 1, 1893 - Dec. 31, 2014
Combination of Seattle-Tacoma Airport and Federal Building
Blue numbers -- wettest days of month
Red numbers -- driest days of the month
Green number -- wettest day of the year
Orange number -- driest day of the year.
Data courtesy: National Weather Service. Chart courtesy: Evan Schmidt.