**Clear skies and light winds under a dry airmass favor radiational cooling, with National Weather Service and private forecasts converging on a Tuesday, September 29 low in the upper 50s to low 60s °F—near the 1991–2020 climatological average of ~61.5 °F.** A northerly flow has delivered recent “false fall” conditions with overnight lows in the mid-50s, but a building subtropical ridge is expected to gradually warm the boundary layer through the period. Model consensus shows minimal precipitation risk and only light easterly winds by Tuesday night, limiting mixing and allowing efficient surface heat loss after sunset. The near-even market pricing on the 49 °F-or-below versus 68 °F-or-higher extremes (50 % vs 49 %) captures residual forecast uncertainty: a stronger-than-expected cold pool or drier dew points could push the low toward the lower tail, while any increase in cloud cover or warm advection would support the upper tail. Intermediate bins at 20 % each reflect traders’ assessment that the most probable outcome lies between these tails, with resolution hinging on the final NWS forecast discussion and overnight observations at Hartsfield-Jackson Atlanta International Airport.