Recent forecasts from multiple models indicate Seattle's September 14 high will likely fall in the mid-to-upper 60s Fahrenheit, driven by persistent marine layer clouds and southerly flow that limits daytime solar heating after heavy rain on the 13th. Onshore winds and high humidity suppress temperature rises typical for mid-September, when the climatological average high is 71°F, while partial afternoon clearing could allow brief warming into the low 70s if insolation increases. Ensemble guidance shows modest spread in timing of any break in cloud cover, creating the tight clustering of market-implied odds around 66–71°F bins. National Weather Service updates and next model runs will refine the exact maximum before resolution.