Clear skies, light northwest winds, and moderate humidity under a high-pressure ridge are expected to drive Atlanta's overnight minimum temperature on August 23, 2026, toward the mid-60s°F according to National Weather Service and model guidance. Radiative cooling under these conditions typically produces lows several degrees below the climatological average of 70.5°F, while any increase in cloud cover, wind speed, or dew points could limit cooling and keep the minimum higher. The near-even market split between the 82°F-or-higher and 63°F-or-below outcomes reflects trader assessment of forecast uncertainty in exact boundary-layer mixing and local urban heat-island effects, with resolution hinging on the official 24-hour minimum recorded at the primary Atlanta observation site.