Recent forecasts from models such as ECMWF and GFS point to a mild overnight period for Buenos Aires on September 25, with minimum temperatures most likely between 12–15°C under a building high-pressure ridge and a shift to lighter southerly winds after earlier northerly advection. Radiational cooling under partly cloudy skies and dew points near 11–13°C will set the floor, while any residual cloud cover or wind could limit drops below 12°C. Trader sentiment remains split between the sub-12°C and above-20°C outcomes because model spreads and timing of the wind shift introduce meaningful uncertainty this close to the observation window, with final NWS-equivalent guidance and real-time station data expected to resolve the exact low.