Hartsfield-Jackson Atlanta International Airport in Atlanta had over 5 inches ( 130 mm ) of rain on July 6 , its sixth-highest one-day rainfall since 1878 ; most rain fell during just two hours ( 8 to 10 p.m. EDT ) . Hartsfield-Jackson Atlanta International Airport in Atlanta recorded over 5 inches ( 130 mm ) of rain on July 6 , its sixth-highest one-day rainfall since records began in 1878 ; most of the rain fell during just two hours ( 8 â `` 10 p.m. EDT ) .