**Forecast models from the National Weather Service and private providers converge on a daytime high of 71–72°F for Seattle on August 28, 2026, under partly to mostly sunny skies after morning cloud cover.** This consensus directly explains the dominant 72–73°F bin at 61.5% market-implied probability, with adjacent 70–71°F and 74–75°F outcomes receiving the next-highest shares. Current observations show temperatures rising from overnight lows in the upper 50s amid light southwesterly flow and moderate humidity. The pattern reflects typical late-August conditions near the Pacific Northwest coast, where marine influence and a stable ridge limit extreme warming. Historical normals place the average high near 75°F, but recent model runs and local climatology favor slightly cooler readings today. No significant shifts in steering flow or thermal advection have emerged in the past 24 hours to push probabilities outside the narrow 70–75°F window. With the trading day concluding as observations finalize, the market reflects aggregated trader assessment of these official forecasts rather than any outlier scenario.