**Recent model consensus and active storm patterns are anchoring trader expectations for a maximum temperature of 22–24 °C in Mexico City on August 29.** Multiple short-range forecasts issued on August 28 indicate a high near 20–24 °C (roughly 68–75 °F), with afternoon thunderstorms and widespread cloud cover expected to limit surface heating. Mexico City’s high elevation (~2,240 m) already keeps baseline maxima modest during the North American monsoon season; the added effects of persistent moisture, reduced insolation, and evaporative cooling from rainfall further cap temperatures in the low-to-mid 20s °C range. Historical climatology for late August shows typical highs around 23 °C, but current conditions feature above-average cloudiness and precipitation probability (70–90 % in several runs), tilting outcomes toward the lower end of that envelope. The market’s heaviest volume on 23 °C (41 %) followed by 22 °C (27.5 %) and 24 °C (17 %) aligns with this narrow forecast band, as traders weigh the latest guidance from sources such as the National Meteorological Service and global models. Any late-day clearing or delayed storm initiation could push readings toward 24–25 °C, while heavier or earlier rainfall would favor 21–22 °C. The next model update cycle and real-time observations through the morning of August 29 will be the key near-term catalysts.