**Current forecast models from sources like WeatherBug and NOAA-aligned data indicate Seattle's overnight low for September 4 will likely settle in the lower to mid-50s °F, consistent with the climatological average of ~54.9 °F for that date.** Trader sentiment reflects this baseline while incorporating uncertainty around exact minimums, driven by variable cloud cover, light winds, and minor shower chances that modulate radiative cooling overnight. The closely matched leading outcomes (45 °F or below at 34.5%, 52-53 °F and 54-55 °F at 32% each) highlight how small shifts in marine-layer influence or timing of any clearing can differentiate bins. Clearer skies promote greater heat loss via longwave radiation, potentially nudging the minimum toward the lower 50s or below, whereas persistent clouds trap heat and support readings near 55 °F. Historical records show occasional dips to the low 40s, but no strong cold advection or high-pressure setup is indicated in the short-term pattern, keeping probabilities anchored near typical early-September maritime conditions. Upcoming model runs and evening observations will refine the precise threshold, with traders weighing these against the low odds for extremes above 56 °F or well below 50 °F.