Forecast consensus from the National Weather Service and major models points to a high near 83–85°F in Seattle on August 25, driven by building upper-level ridging that favors sunny to partly cloudy skies and light winds. This pattern supports the tight market split between the 82–83°F and 84–85°F bins, as small variations in afternoon insolation, marine-layer intrusion, or boundary-layer mixing can shift peak readings by 1–2°F. Recent model runs show limited spread, with most guidance converging on this range rather than cooler onshore flow or hotter downslope warming. Historical August climatology in the region averages highs near 76–79°F, so current conditions reflect a modest warm anomaly consistent with the summer outlook. Updated NWS briefings and next model cycle remain the key near-term catalysts.