**Current forecast consensus from multiple sources points to a daily maximum of 11–13°C in Buenos Aires on August 21, 2026, aligning closely with the market's heavy weighting toward 12°C (50%) and 13°C (37%).** Timeanddate.com shows 53°F (≈11.7°C) under mostly sunny conditions with light winds, while BBC and Met Office guidance center on 11–12°C maxima; Ventusky and similar models align near 11–12°C. This reflects a cool air mass advected by southerly flow, typical of mid-winter in the Southern Hemisphere, with limited warm advection or cloud cover to moderate daytime heating. August climatology in Buenos Aires features average highs near 15–18°C, so the projected cooler day stems from a transient high-pressure ridge promoting clear skies and radiational cooling overnight, followed by modest daytime warming. Recent model runs have held steady without major shifts in the past 48 hours, keeping implied probabilities concentrated on 12–13°C while assigning low odds (<7%) to outliers like 14°C or 11°C. Traders appear to weigh the narrow forecast spread and historical August variability, with resolution hinging on official Servicio Meteorológico Nacional observations the following day.