**Trader consensus at 100% for 26°C or higher on October 13 reflects verified meteorological observations from official monitoring stations in Mexico City.** Recent surface data showed daytime maxima reaching or exceeding this threshold under partly cloudy conditions with light winds and minimal precipitation, consistent with late dry-season patterns at the city's high elevation. These readings align with National Meteorological Service (SMN) protocols using calibrated instruments at standard heights. Minor variations across urban stations or microclimates could theoretically adjust the official daily maximum, though post-event quality control rarely reverses an exceedance once confirmed. No further model updates or revisions are expected to alter the outcome.