**Trader sentiment for the highest temperature in Buenos Aires on August 17 centers on 13–15°C because an approaching cold front is expected to deliver cooler-than-average conditions during the Southern Hemisphere winter.** Seasonal averages place August daytime highs near 17°C, yet official forecasts and model guidance indicate the front—moving in from the southwest—will shift winds to southerly directions, advecting cooler subpolar air and limiting daytime warming. This setup aligns with specific outlooks projecting a high around 14°C under partly cloudy skies and moderate breezes. The market’s heavy weighting toward 14°C (43.5%) followed by 13°C and 15°C reflects this consensus, while lower probabilities for 16°C+ or single-digit readings capture remaining uncertainty in exact frontal timing and local urban heat-island effects. Recent mid-August reporting on the cold front’s arrival has reinforced these cooler scenarios ahead of resolution on the 17th.