Recent forecasts from multiple meteorological models indicate an approaching rain system will bring cloudy skies, high humidity near 85-90%, and light to moderate precipitation to Chongqing on September 16, suppressing daytime heating and limiting radiative cooling overnight. This setup favors a daily minimum near 19-21°C, cooler than the September climatological average low of around 22°C, as persistent cloud cover and northerly flow advect slightly cooler air. Trader sentiment remains closely divided because ensemble model runs show modest spread in exact overnight lows and timing of heaviest rain, with the 15°C-or-below and 25°C-or-higher bins capturing tail risks from forecast shifts. Updated guidance from agencies like the China Meteorological Administration and global ensembles will likely tighten the range ahead of resolution.