Official observations from National Weather Service stations, including Seattle-Tacoma International Airport, recorded a maximum temperature of 62°F on September 25, 2026, aligning directly with the market's dominant 62-63°F outcome. Cooler-than-average conditions prevailed due to a low-pressure system that delivered steady rain, cloud cover, and marine air influence, suppressing afternoon highs several degrees below the seasonal normal of about 67-70°F. Multiple independent datasets from NOAA and regional networks confirm this reading with no significant discrepancies. Realistic challenges remain minimal but could include rare post-event data revisions by the reporting agency or a market resolution rule tied to a non-standard station or threshold definition.