Official meteorological observations for Buenos Aires on September 5, 2026, recorded a daily maximum of 13°C under clear to partly cloudy skies, light southwesterly winds around 7–11 km/h, and low humidity near 41–48%. This value aligned with multiple real-time reports and fell within the cooler end of early-spring climatology for the region, where September averages hover near 15–18°C highs but can dip with transient high-pressure systems. Trader consensus converged rapidly on the 13°C outcome once preliminary station data confirmed the peak, leaving negligible probability for deviations. Only an unforeseen measurement revision or alternate station reading could alter resolution, though official Servicio Meteorológico Nacional records anchor the result.