**Forecast models and official guidance point to a high in the upper 80s for Atlanta on August 29, 2026, with afternoon convection and easterly flow as the main moderating influences.** National Weather Service and private models (WeatherBug, AccuWeather equivalents) converge on highs of 85–88 °F, driven by partly to mostly cloudy skies, 30–50 % thunderstorm chances after midday, and light east winds that limit daytime mixing and solar insolation. Recent August conditions—multiple days above 90 °F earlier in the month—have given way to slightly cooler, more humid air arriving from the east, increasing low-level moisture and cloud cover that caps peak temperatures. Historical climatology for late August shows an average high near 87 °F, providing context for why the market-implied probabilities cluster tightly around the 86–89 °F bins. Upcoming afternoon model updates and radar trends on the 29th will determine whether scattered storms develop early enough to suppress readings into the mid-80s or allow brief clearing that pushes toward the upper end of that range.