Recent frontal passage and associated instability over Buenos Aires on October 3, with widespread showers, storms, and cooler southerly flow, set up clearing conditions for October 4. Official Servicio Meteorológico Nacional guidance and multiple model outputs indicate skies turning partly to mostly sunny under light northerly or northwesterly winds, favoring modest daytime warming. Forecast maxima cluster near 19–22 °C, with limited spread reflecting uncertainty in exact peak timing, boundary-layer mixing, and any residual cloud cover. Historical early-October baselines hover around 20 °C, so modest exceedances toward 23–25 °C would require stronger insolation or warmer advection than currently modeled. Traders appear to weight the potential for slightly above-consensus readings, consistent with the tight clustering around 23–25 °C outcomes. Updated SMN briefings and next model cycles will refine the precise daytime maximum before market resolution.