**Current forecast models indicate a highest temperature of 26–27°C as the most probable outcome for Mexico City on August 4, 2026, consistent with the market’s 86.5% combined implied probability for those two bins.** At Mexico City’s high elevation of roughly 2,240 meters, August falls in the core of the rainy season, when frequent afternoon cloud build-up and scattered showers reduce incoming solar radiation and cap daytime maxima. Ensemble guidance from major models shows highs clustering near the long-term August average of 23–25°C, with modest warming possible if morning sunshine persists longer than typical before convection develops. Recent model runs have shown little deviation from this pattern, supporting the tight distribution around 26–27°C rather than higher or lower extremes. Traders are pricing the modest upside risk to 28°C or above at only 16%, reflecting both climatological precedent and the stabilizing effect of expected precipitation. Updated official forecasts from agencies such as CONAGUA or the National Meteorological Service tomorrow morning will provide the final observational benchmark for market resolution.