Recent forecasts from multiple models indicate overnight lows near 12°C in Buenos Aires on October 9, driven by persistent southerly flow advecting cooler maritime air and extensive cloud cover that limits radiative cooling. Trader consensus around 9–11°C reflects uncertainty in boundary-layer processes, including potential for clearer skies or stronger cold-air intrusions that could enhance surface heat loss and drop temperatures further. Dew points near 9–10°C provide a floor, while wind speeds of 10–20 km/h mix the layer and moderate extremes. Historical October minima average around 11–13°C, but current model spread on timing of any clearing creates the tight market spread between the leading outcomes. Updated observations and evening model runs will clarify resolution thresholds.