Clear skies and light northeasterly winds across Zhengzhou on September 4 are supporting efficient overnight radiative cooling under dry conditions typical of early autumn in the North China Plain. Official and model guidance from multiple sources consistently points to a daily minimum near 19°C, with evening readings already in the low 20s°C and limited moisture to moderate temperature drops. This aligns with climatological norms for the region, where September lows average around 18–20°C absent frontal systems or significant cloud cover. Trader positioning heavily favors the 19°C outcome, reflecting real-time synthesis of surface observations and short-range forecasts, while lower bins capture residual uncertainty from potential microscale variations or measurement timing. No major atmospheric shifts are expected before resolution based on official daily records.