**Current National Weather Service forecasts and supporting model guidance point to a high near 68–70°F in Seattle on September 7, driven by increasing onshore flow, mostly cloudy skies, and a moderating marine influence that limits daytime heating.** Light southerly winds are expected to advect cooler, moister air from the Pacific while widespread cloud cover reduces solar insolation, keeping maximum temperatures several degrees below the early-September climatological average of roughly 72–73°F. Minor forecast differences among runs hinge on the precise timing and thickness of the cloud deck and any subtle shifts in wind direction that could either enhance or suppress mixing with warmer aloft air. With leading market-implied probabilities tightly clustered between the 66–71°F bins, traders are effectively pricing the typical spread seen in short-range temperature guidance when clouds and boundary-layer moisture introduce modest uncertainty. Updated model runs and the next NWS forecast discussion will likely provide the clearest near-term signal on whether the high settles at the lower or upper end of that narrow range.