Current forecast models from sources including WeatherBug and WindBorne project overnight lows in Mexico City for October 13 near 11–13°C amid partly cloudy skies, scattered showers, and light variable winds. At the city’s high elevation of roughly 2,240 meters, radiative cooling overnight is modulated by cloud cover and urban heat effects, which can shift minimum temperatures by 1–3°C depending on the timing and extent of precipitation. Ensemble guidance shows limited spread around these values, with historical October climatology placing typical lows near 12–14°C. Traders appear to weigh the narrow band of model outputs against potential revisions from updated runs or official Servicio Meteorológico Nacional observations, keeping implied probabilities evenly distributed across the 8–16°C range ahead of the daily minimum reading.