Official observations from Seattle-Tacoma International Airport confirmed a daily maximum of 82–83°F on July 31, 2026, aligning with National Weather Service data and driving the near-certain market consensus on that narrow bin. This value sits modestly above the long-term July average high of roughly 76–78°F, reflecting typical late-summer conditions without the strong marine push or heat dome that would produce higher readings. Forecast models issued in the preceding days converged on this range, and no post-observation revisions or station discrepancies emerged to alter the recorded peak. While rare measurement adjustments or alternative stations can occasionally shift outcomes, the clear alignment of official data leaves little realistic room for other bins to resolve the market.