Forecast uncertainty in National Weather Service and ensemble model guidance for overnight radiative cooling under partly cloudy to clear skies is driving the near-even split between 82°F or higher and 63°F or below. Recent passage of a weak frontal boundary has lowered daytime highs and dew points across north Georgia, creating conditions where the minimum temperature on August 23 hinges on exact timing of clearing skies and boundary-layer mixing. Climatologically, Atlanta’s late-August overnight lows average near 69–71°F, with a standard deviation of roughly 4°F, so the market’s clustering around 70–75°F ranges reflects the most probable central tendency while the tail outcomes capture model spread on wind and cloud cover. Updated NWS short-range forecasts and 00Z model runs tonight will likely narrow the distribution before the observation window closes.