Recent National Weather Service model runs and ensemble guidance point to a strong upper-level ridge promoting subsidence warming and mostly sunny skies over western Washington, placing Seattle's June 23 maximum in the mid-to-upper 80s at Sea-Tac. Trader consensus clusters on 86–89°F bins because historical analogs and current soundings show limited marine-layer moderation from Puget Sound under light northerly flow, while small shifts in ridge position or timing of any onshore breeze could trim or boost the peak by 2–3°F. Above-normal seasonal temperatures driven by the broader Pacific Northwest heat pattern add upward pressure, yet coastal influences and typical diurnal ranges keep probabilities spread rather than concentrated above 90°F.