May was cooler and wetter than average. The average temperatures in eastern Iowa were 2 to 3 degrees below normal. It was even colder to our northwest.
May 16 Cedar Rapids: 90 (previous record 90 in 1992/1936/1931)
May 16 Iowa City: 91 (previous record 90 in 2001)
Rain amounts were way above normal. Some locations in eastern Iowa approached 10″ of rain. Southern Iowa rain amounts were 300% above average. Iowa City had measurable rain on 21 days in May.
New Daily Rainfall Records
May 18 Cedar Rapids 2.02″
May 24 Waterloo 2.04″
May 24 Dubuque 2.12″