Mexico City's high-elevation setting (approximately 2,240 m) and peak rainy-season conditions produce a tight clustering of forecast highs around the long-term July average of 23–24°C. Recent model guidance and station observations show daytime maxima modulated primarily by variable cloud cover, afternoon convective showers, and solar insolation, with limited potential for brief clear spells to push readings to 25–26°C. The near-even split between 24°C and 25°C outcomes in the market reflects this narrow uncertainty band, as modest shifts in precipitation timing or boundary-layer moisture can differentiate those thresholds without altering the broader climatological regime. Updated short-range forecasts and local observations on July 12 will resolve the precise peak.