National Weather Service forecasts and ensemble model guidance place Atlanta’s overnight low on August 26 near 70–75 °F, with the latest runs showing a narrow spread driven by variable cloud cover and scattered thunderstorm activity. Light southeast winds and dew points in the upper 60s limit radiational cooling, while any persistent clearing after midnight could push readings toward the lower end of that range. Traders assign roughly equal implied probability to the 70–71 °F, 72–73 °F, and 74–75 °F bins because official guidance from the Peachtree City office and recent GFS/ECMWF updates remain within a few degrees of one another, with only modest shifts expected from updated model cycles before dawn. Historical climatology for late August supports this tight clustering around the 70 °F baseline.