The market's overwhelming consensus on a 7°C minimum for Buenos Aires on September 17, 2026, reflects official station observations confirming that exact low under clear skies and light northerly flow. Surface data showed overnight radiative cooling typical for early spring, with temperatures bottoming near dawn before rapid daytime recovery to highs near 21–22°C. Model consensus from prior days aligned closely with this outcome, and no revisions to station readings have altered the result. A shift to 6°C or below would require either colder advection or greater cloud-free cooling than observed, scenarios not supported by the final verified measurements.