**Current forecasts from multiple models and agencies point to a minimum temperature in Zhengzhou on August 30 clustered around 21–23°C, driven by a recent influx of cooler northerly air and mostly stable conditions with limited overnight radiative cooling.** Light to moderate northerly winds (2–5 m/s), elevated humidity near 60–70%, and variable cloud cover (partly to mostly cloudy) are the key variables that will determine whether the low settles near 22°C or 23°C versus a slightly cooler 20–21°C outcome. Recent developments include a cooling trend noted by the Henan Meteorological Service, with daytime highs dropping below 30°C and expected overnight lows in the low-20s°C range under northerly flow, consistent with historical late-August patterns but tempered by lingering moisture. Model consensus shows minor spreads due to differences in simulated cloud timing and boundary-layer mixing, with no significant weather systems or precipitation expected to disrupt the pattern. Traders appear to weigh these small forecast uncertainties heavily, as resolution hinges on official observations from the China Meteorological Administration for the calendar day minimum. New evening model runs or surface observations on August 29 could refine the exact threshold.