SXUS73 KFSD 160637 RERSUX RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 137 AM CDT SAT JUN 16 2018 ...RECORD WARM LOW TEMPERATURE BROKEN AT SIOUX CITY IA... THE LOW TEMPERATURE IN SIOUX CITY ON FRIDAY WAS 77 DEGREES, WHICH BREAKS THE RECORD FOR THE WARMEST LOW TEMPERATURE ON JUNE 15TH. THE PREVIOUS RECORD OF 74 DEGREES WAS SET IN 1922. $$