Recent National Weather Service guidance and ensemble model runs highlight uncertainty in Atlanta's overnight low on October 5, with a frontal passage and widespread rain Sunday into Monday driving a shift from unseasonably warm, humid conditions toward cooler, drier air. Current forecasts cluster around 58–68°F, near the 1991–2020 climatological average low of 59°F for the date, yet spread in guidance leaves roughly equal market-implied odds on sub-60°F readings versus staying above 77°F. Key variables include exact timing of clearing skies, boundary-layer moisture retention, and wind speeds that could limit radiational cooling. Updated NWS point forecasts and 00Z/12Z model cycles over the next 48 hours will likely refine these thresholds ahead of resolution.