Atlanta, Georgia has experienced with the coldest second half of the September since 1979, according to electroverse.net and fox5atlanta.com ("from 15. September through the end of the month").
To extremely cold conditions in the region contributed Arctic blasts on the back sides of hurricanes (ex-hurricanes) Sally and Teddy and remnants of tropical storm Beta, which was shifting along East Coast during second half of September 2020.
Average maximum temperatures dropped down mainly 3 days with maximum below 70°F (21°C).
Hurricane Sally and remnants of tropical storm Beta brought to Atlanta 5.51 inches (140 mm) of rain during this period and year 2020 is climbing to the TOP 10 wettest years in history.
During the first 6 October days, the continuing of cold conditions in the region is expected, with maximum temperatures only 69 - 78°F (20 - 25°C), but temperature average for the first October week is 78°F (25°C).
During fist October decade, the region is waiting 2 powerful coldwaves /https://mkweather.com/2020/10/01/thanks-to-hurricane-indian-summer-in-the-usa-canada-in-the-2nd-october-decade-is-expected-after-2-powerful-coldwaves-until-10-october// and only after 10. October, Indian summer is expected northward from Atlanta with warm weather in Georgia, too.