Recent forecast guidance from agencies like the National Meteorological Service of Mexico points to afternoon convection and scattered showers moderating peak heating in Mexico City’s highland basin on August 22. Typical August conditions feature daytime maxima near 24 °C, with cloud cover and evaporative cooling from thunderstorms often capping temperatures 1–2 °C below clear-sky potential. Model spreads in timing and coverage of precipitation create the tight clustering around 23–25 °C outcomes, while the city’s 2,240 m elevation and surrounding topography limit extreme excursions. Traders appear to weigh these dynamic factors against climatological baselines, producing the observed market-implied distribution.