Trader consensus on Polymarket, reflected in closely bunched implied probabilities around 10–12°C, centers on moderate overnight cooling expected under a southerly flow and increasing cloud cover ahead of isolated storms on August 27. Official guidance from Argentina’s Servicio Meteorológico Nacional and global models (including Met Office and Yr) indicate a minimum near 11–12°C in central Buenos Aires, with the precise value hinging on the timing of any frontal passage, wind speeds that limit radiative cooling, and variable cloud thickness that could either trap heat or allow clearer skies for greater temperature drops. Recent observations show conditions several degrees above the August climatological average minimum of roughly 7°C, reducing the odds of readings at 8°C or below while leaving room for model spread on whether the low settles at 10°C or edges higher. Updated forecast runs and any last-minute adjustments to storm coverage will be the key near-term drivers of further shifts in market-implied odds.