SXUS73 KDMX 220709 RERDSM RECORD EVENT REPORT NATIONAL WEATHER SERVICE DES MOINES IA 209 AM CDT WED SEP 22 2016 ...RECORD MAXIMUM LOW TEMPERATURE SET AT DES MOINES... THE LOWEST TEMPERATURE ON WEDNESDAY WAS 75 DEGREES AT DES MOINES. THIS SETS A NEW RECORD FOR THE WARMEST LOW TEMPERATURE FOR SEPTEMBER 21ST. THE PREVIOUS RECORD WAS 72 DEGREES SET IN 1895. $$