Official meteorological observations from Argentina’s Servicio Meteorológico Nacional confirmed a daily maximum of 16°C in Buenos Aires on August 4, aligning precisely with the market’s sole outcome. This reading reflects typical mid-winter conditions under a stable high-pressure system that suppressed warmer air advection from the north, keeping afternoon temperatures well below seasonal averages near 18–20°C. Forecast models from the day prior had already converged on this range, and post-event verification showed no revisions or station discrepancies. While sensor calibration issues or localized microclimate anomalies could theoretically prompt a re-evaluation, such events are exceedingly rare once data are finalized and published.