Latest National Weather Service guidance and ensemble forecasts position Atlanta’s August 21 high near 92–93 °F as the most probable outcome because a frontal boundary is introducing increased cloud cover, scattered showers, and modest moisture that caps insolation and limits afternoon heating. Recent model runs show daytime maxima easing from the mid-90s observed earlier in the week into the low-to-mid 90s, consistent with climatological late-August norms once tropical moisture and weak steering flow moderate the ridge. Traders have therefore concentrated probability in the 90–95 °F bins while assigning only single-digit odds to extremes above 96 °F or below 88 °F, reflecting the narrow uncertainty range typical 24–36 hours before resolution.