Current forecasts from multiple models, including GFS and ECMWF runs, indicate a minimum temperature near 10–11°C for Buenos Aires on September 30, driven by southerly winds advecting cooler air after recent showers and partial overnight clearing that promotes moderate radiational cooling. Spring climatology supports lows in this range, with historical September minima typically 8–13°C, though ensemble spreads introduce uncertainty around exact overnight cloud cover and wind speeds that could shift the low by a few degrees. Trader sentiment remains closely balanced between the <=5°C and >=15°C outcomes because short-term model variability and potential steering pattern changes keep both tails plausible until final observational data. Updated NHC-style regional guidance and next model cycles will refine resolution criteria ahead of market close.