Recent frontal passage and increased marine air influence are positioning Seattle’s September 26 high temperature in the low-to-mid 60s°F. Official forecasts from the National Weather Service and models show post-frontal clearing with partly cloudy skies and light northerly winds, limiting daytime warming after showers on the 25th. This keeps readings several degrees below the 67°F climatological average high for the date, with consensus centering near 61–64°F across sources. The market’s heavy weighting on 62–63°F (49%) and 64–65°F (32.5%) reflects this model agreement and limited upside potential from residual cloud cover or stronger onshore flow. Final NWS observations at Sea-Tac will determine resolution.