Latest National Weather Service and AccuWeather model runs for Seattle on August 8, 2026, converge on a daily maximum near 80–81°F under mostly sunny skies with light northwest winds, keeping the marine layer influence modest and limiting afternoon heating. This consensus drives the market’s tight clustering around 80–83°F outcomes, where traders weigh small differences in cloud timing, boundary-layer mixing, and Sea-Tac station specifics against historical August variability of roughly ±3°F. Recent warmer-than-average summer conditions provide a slight upward bias, yet no strong thermal ridge or offshore flow is present to push readings into the mid-80s. Final resolution hinges on the official hourly observations through late afternoon, with any late-day clearing or wind shift the main variables still in play.