Forecast models from NOAA and the National Weather Service show tight clustering around Atlanta's July 29 maximum near the seasonal normal of 89–91 °F, with slight differences in 92–93 °F versus 90–91 °F outcomes reflecting uncertainty in peak afternoon heating. Key variables include the strength and timing of daytime insolation under partly cloudy skies, boundary-layer mixing driven by light southerly flow, and any late-day convective development that could cap temperatures. Ensemble guidance diverges modestly on dew-point advection and wind speeds, which modulate the heat index and actual thermometer readings. With resolution hinging on a single day's official observation, traders weigh the latest model runs and mesonet trends heavily as the event approaches.