The high temperature for Des Moines on Monday reached 91 degrees and just barely missed 90 on Tuesday with a high of 89. Such warm temperatures are somewhat rare for May as shown by the featured chart depicting monthly percentiles and return intervals for having a daily high temperature 90+. The return interval of 1.3 years for May is approximately three total days over a four year period. Both 2015 and 2016 failed to yield a 90+ temperature for Des Moines in May.

Voting:
Good = 9
Bad = 2