Forecast models from agencies like the China Meteorological Administration indicate Zhengzhou's overnight minimum on August 22 will likely fall between 23–25°C, driven by persistent high humidity from the East Asian summer monsoon, widespread cloud cover, and scattered thundershowers that limit radiational cooling after sunset. These conditions suppress the typical diurnal drop seen on clearer nights, keeping lows above the long-term August average near 22°C. Minor variations in forecast timing of precipitation or wind shifts create the tight clustering around 23°C and 24°C outcomes, while the modest edge for 25°C+ reflects expectations of continued muggy, overcast skies. New model runs and surface observations over the next 24 hours will refine these thresholds ahead of market resolution.