**Cloud cover and widespread showers from an approaching low-pressure trough are the main factors capping Atlanta's high temperature on August 27 near the mid-to-upper 80s.** Official National Weather Service forecasts and multiple models indicate partly sunny morning conditions transitioning to mostly cloudy skies with showers likely by afternoon, producing a 60–70% precipitation chance that limits surface heating. Light southerly winds and elevated humidity further moderate maxima, consistent with highs of 85–90°F across sources. This places the greatest market-implied odds on the 82–89°F buckets, reflecting model consensus around storm timing and coverage rather than extreme heat. Historical late-August averages near 88°F provide context, but the active pattern deviates from clearer, warmer setups. Updated NWS briefings and afternoon model runs will refine the exact peak before resolution.