**Forecast uncertainty for Buenos Aires minimum temperatures on October 7 stems from an approaching frontal boundary and contrasting air masses, with models showing lows clustered between roughly 13–17 °C amid widespread cloud cover and showers.** Official guidance from sources such as the Servicio Meteorológico Nacional and ECMWF runs indicate negative temperature anomalies of several degrees relative to climatology, driven by southeasterly flow advecting cooler maritime air while persistent overcast skies limit nocturnal radiative cooling. This setup keeps the distribution of possible minima tightly grouped, explaining the near-even market split between sub-12 °C and 21 °C+ outcomes alongside comparable probabilities for the 13–20 °C band. Updated model runs and surface observations over the next 48 hours will refine steering patterns and precipitation timing that ultimately determine the exact daily low.