National Weather Service forecasts point to an 86°F high in Atlanta today under a strengthening high-pressure ridge delivering mostly sunny skies and light northwest winds. This setup maximizes solar insolation and boundary-layer mixing, supporting peaks in the mid- to upper-80s, though minor increases in afternoon humidity or scattered cirrus could trim readings by a degree or two. Model ensembles from GFS and ECMWF cluster near 83–85°F, creating the tight contest between the 84–85°F and 86–87°F bins that together hold over 65% of market-implied probability. Resolution depends on the official Hartsfield-Jackson Airport observation; any late-day convective development would favor the lower outcome while clear conditions through sunset push toward the higher one.