Recent National Weather Service and GFS model guidance point to sunny skies and light westerly winds sustaining strong daytime insolation over Atlanta on October 15, supporting a daily high in the upper 80s. Clear conditions overnight will allow efficient radiational cooling before sunrise, while minimal cloud cover and weak advection from the west limit afternoon mixing that could otherwise cap the peak. The narrow 51–42 percent split between the 86–87 °F and 88–89 °F bins reflects trader assessment of residual model spread in maximum temperature timing and boundary-layer depth, with historical October averages near 74 °F underscoring the above-normal warmth under this stable high-pressure pattern. Updated model runs tomorrow morning will further refine the exact peak.