**Current forecasts from multiple sources (NOAA-aligned models, Yr.no, Met Office, and local observations) converge on a daytime maximum of 16–18°C for Buenos Aires on August 28, driven by persistent southeast winds advecting cooler maritime air and extensive cloud cover that limits solar heating.** Winds of 4–8 m/s from the southeast maintain stable stratification and suppress strong boundary-layer mixing, while cloud fractions often exceeding 50–90% reduce incoming shortwave radiation during peak insolation hours (roughly 12:30–15:30 local time). Historical climatology places the late-August mean high near 16°C, providing a baseline that aligns with the cooler end of current guidance. The tight clustering of market-implied probabilities around 19–20°C (versus 18°C) reflects residual uncertainty in model runs regarding the exact timing and extent of any afternoon clearing, which could allow an extra 1–2°C of warming if cloud breaks occur earlier than expected. Minor differences in ensemble members—such as slight variations in dew-point advection or boundary-layer depth—primarily separate the 19°C versus 20°C outcomes, with no major synoptic shift (e.g., frontal passage or warmer northerly flow) indicated in the latest guidance. Updated model runs and official agency briefings over the next 24 hours remain the key near-term catalysts for any repricing.