Traders have settled on 15°C as the definitive highest temperature recorded in Buenos Aires on June 13, reflecting verified observations from Argentina’s Servicio Meteorológico Nacional. Southern Hemisphere winter conditions, driven by a stable high-pressure system and moderate southerly flow, produced typical cool daytime maxima without notable warming from föhn effects or urban heat islands. Multiple official stations reported peaks aligning precisely at this level, consistent with climatological baselines for early June. While minor adjustments from data quality checks or station-specific anomalies remain possible, the consensus across networks and the timing of final reporting make any deviation highly unlikely.