**Recent cooling trends and forecast model consensus around 12–15°C are anchoring trader sentiment for the highest temperature in Buenos Aires on August 7, 2026.** With August marking mid-winter in the Southern Hemisphere, typical daytime maxima hover near 15–17°C, yet the latest model runs indicate a southward surge of cooler maritime air that should cap highs in the low-to-mid teens. Recent observations show a sharp drop from 17°C on August 3–5 to around 15°C on August 6, supporting the market’s tight clustering on 13°C (24.5%), 14°C (36.5%), and 15°C (32.5%). Key differentiating factors include the exact timing and strength of the cold-air advection, boundary-layer mixing under mostly clear skies, and minor model spread in 850 hPa temperatures and surface pressure gradients. Official guidance from regional meteorological services points to a sunny but cooler day, with low precipitation risk and light winds that limit further warming. New model updates and observational data over the next 24 hours will likely refine the 1–2°C uncertainty range that currently separates the leading outcomes.