Recent forecasts from the National Weather Service and regional models point to a Seattle high near the September climatological average of 69°F, with morning patchy fog or stratus expected to clear under building high pressure and light northerly winds, yielding partly to mostly sunny afternoon conditions. This setup creates tight clustering around 66–71°F outcomes in the market, as modest differences in cloud timing, marine layer depth, or localized sea-breeze effects can shift the peak by a degree or two. Historical analogs show similar transitional days often produce highs within this narrow band, while the absence of stronger onshore flow or upper-level support limits upside potential beyond the low 70s. Updated model runs and surface observations through midday will refine resolution criteria for the daily maximum.