**Recent short-range forecast models from sources like WeatherBug, Yr.no, and others indicate a minimum temperature on September 1 around 22–25°C under mostly sunny to clear conditions with light northeast winds, supporting trader focus on the lower end of the range.** Clear skies overnight promote radiative cooling, while moderating humidity (around 45–50%) and the absence of significant precipitation or cloud cover limit warming. Chongqing’s basin topography can enhance local cooling compared to broader regional averages, and the transition from late-August heat sets up conditions where even modest shifts in steering patterns or model consensus could push the overnight low below 20°C. With resolution imminent, markets price in elevated uncertainty around exact minima, reflected in the leading implied probability for 18°C or below alongside clustered odds near 21–22°C. Historical early-September lows average near 23–24°C, so any confirmed cooler model runs or observational updates would further reinforce these outcomes.