Recent forecasts from models like those referenced by meteorological services show a high near 15°C in Buenos Aires on October 1, driven by a strengthening high-pressure system and persistent southwesterly winds advecting cooler maritime air from the South Atlantic. Cloud cover exceeding 80% during peak heating hours will suppress surface warming, while dew points around 6–8°C limit moisture-driven instability. The narrow spread between 14°C, 15°C, and 16°C outcomes reflects minor differences in model timing of wind shifts and boundary-layer mixing; a slightly stronger southerly flow or delayed clearing could cap the maximum at 14°C, whereas reduced cloudiness or a brief northerly component might allow brief excursions to 16°C. Historical early-October averages near 19°C underscore the current anomalous cool advection.