**Trader sentiment for Seattle’s August 24, 2026 daily maximum temperature centers on the 78–79 °F bin (49 % implied probability) and the adjacent 80–81 °F bin (32.5 %), reflecting National Weather Service and model consensus for a mid- to upper-70s high under sunny to partly cloudy skies.** An upper-level ridge building over the Pacific Northwest, following the weakening of an offshore low, has promoted northerly flow and subsidence that favors modest afternoon warming while keeping marine influence in check. Official guidance points to 76–78 °F as the most probable range, with localized heating or minor smoke effects providing the main upside risk that traders have priced into the 80 °F+ outcomes. Historical climatology for the date (average high ~76 °F) supports the tight clustering around these bins, and recent model runs show limited spread, limiting probability mass on both the cooler 76–77 °F and hotter 82 °F+ tails. The market will resolve on official observations (typically Sea-Tac Airport), so any last-hour forecast adjustments from the NWS or rapid changes in cloud cover or wind could shift the final reading within the narrow uncertainty window already reflected in the odds.