**Official forecasts from the National Weather Service and multiple meteorological sources project a daytime high near 90–91°F for Atlanta on August 28, 2026, with afternoon temperatures expected to fall into the mid-80s.** This aligns with the market’s leading 90-91°F bin at 60.5% implied probability. Key drivers include a partly sunny morning with patchy fog, followed by scattered showers and thunderstorms developing in the afternoon (30–50% chance). These storms, tied to an approaching frontal boundary and ample atmospheric moisture, introduce cloud cover and evaporative cooling that limit peak heating. Light north-to-southwest winds further moderate conditions. The climatological average high for the date is 87.4°F, but recent upstream heat (prior days reaching 92–97°F) supports the slightly elevated outlook. Traders appear to weight the consensus model guidance and official NWS point forecasts heavily, recognizing that thunderstorm timing and intensity introduce modest uncertainty around the exact maximum. Lower-probability bins reflect the low likelihood of either strong suppression below 88°F or outlier heating above 93°F under these conditions. Updated model runs and real-time observations through the afternoon will refine the final recorded high.