Uncertainty in short-range forecasts for Beijing's September 14 low temperature stems from competing model runs showing variable cold-air advection and cloud cover ahead of a possible frontal passage. Current ensemble guidance from agencies like the China Meteorological Administration indicates a typical mid-September climatological range of 12–18°C for overnight lows, but recent upper-level trough positioning and surface pressure gradients introduce divergence between cooler scenarios near 9°C or below and warmer ones at or above 19°C. Traders weigh these factors against historical analogs where rapid shifts in wind direction or timing of any precipitation alter minimum readings by several degrees, with new model updates expected within 24 hours likely to narrow the spread.