**Trader sentiment for Seattle's August 30 minimum temperature centers on the 52–57°F range, with the top three bins (52–53°F at 44%, 54–55°F at 35%, 56–57°F at 27.5%) reflecting tight uncertainty in official National Weather Service guidance.** National Weather Service zone forecasts and supporting model consensus point to overnight lows in the lower-to-mid 50s under mostly cloudy skies, light southerly winds shifting northerly, and lingering marine influence from recent showers. This pattern aligns with late-August climatology near Seattle-Tacoma, where average daily minima hover around 55–56°F amid moderating Pacific air. Differentiating factors include exact timing and extent of cloud cover (which limits radiational cooling), dew-point depression, and any subtle steering from upper-level flow that could allow a brief marine push or clearer break. Recent days have featured variable marine layers and light precipitation that cooled surface conditions slightly, tilting some models toward the lower-50s end while others hold near 55–56°F. With resolution imminent, traders are weighing these narrow forecast spreads rather than any single catalyst event.