Official forecasts from Mexico’s Servicio Meteorológico Nacional indicate a minimum of 12–14°C for Mexico City on September 6, driven by widespread cloud cover, scattered heavy showers, and limited radiative cooling overnight. At the city’s high elevation, these conditions typically suppress temperature drops compared with clear nights, though model spreads in timing and intensity of rainfall create uncertainty around exact overnight lows. Persistent moisture from the active rainy season and any embedded convective activity further moderate extremes. Trader sentiment clusters tightly near these values because small shifts in cloud persistence or wind could push readings a degree or two in either direction before official station data resolve the market.