**Current forecasts for Mexico City on August 31 point to a daytime high most likely in the 23–25°C range, consistent with the market’s leading implied probabilities (24°C at 43%, 23°C at 27.5%, 25°C at 19.5%).** Mexico City’s high elevation (roughly 2,240 m) keeps baseline August maxima near 22–24°C even in the rainy season, when persistent cloud cover, high humidity, and frequent afternoon thunderstorms limit solar heating and cap temperature peaks. Late-August 2026 conditions feature ongoing convective activity and overcast skies that have held recent daily highs in the low-to-mid 20s°C, with limited warming expected through the end of the month. Multiple model runs (including GFS, ECMWF-influenced guidance, and local observations) cluster around 20–25°C for August 31, with 24°C emerging as the most frequent outcome due to expected thunderstorm timing that interrupts peak heating. Higher probabilities for 23–24°C reflect the dominance of cloud-rain suppression, while the smaller chance assigned to 25°C or above accounts for any brief clearing or stronger insolation before convection develops. Resolution hinges on the official maximum recorded at the primary Mexico City station, so traders are weighting the latest ensemble consensus and short-range updates from agencies monitoring regional moisture and instability.