National Weather Service forecasts and ensemble guidance from the GFS and ECMWF models cluster Atlanta’s May 16 high temperature around 83–86°F beneath a building high-pressure ridge that favors clear skies and light northwest winds of 5 mph. This pattern enhances daytime solar insolation and boundary-layer mixing, elevating the 84–85°F outcome to a 38% market-implied probability while keeping 86–87°F close behind. Mid-May climatology averages near 82°F at Hartsfield-Jackson Airport, so the current ridge-driven setup accounts for the modest upward shift; any increase in low-level humidity or afternoon convection could cap the peak and favor the 82–83°F bin. Official observations will resolve the market as updated model runs and NWS briefings arrive.