Recent forecast models from sources like the GEM and international agencies project minimum temperatures in Mexico City around 14–15°C for September 27, with highs near 25°C, supporting the closely matched market-implied odds near 48–49% for both 16°C or higher and 6°C or below. At the city's high elevation, radiational cooling under variable cloud cover and light winds determines overnight lows, while scattered precipitation and humidity levels can moderate temperature drops. Trader consensus reflects model uncertainty in exact nighttime conditions over the next 48 hours, with upcoming runs from NOAA and regional services likely to refine resolution criteria around these thresholds.