Current forecast models from multiple sources indicate Zhengzhou's overnight low on September 29 will likely fall between 17–19°C under mostly clear skies following daytime highs near 27–28°C, with light southwesterly winds limiting strong radiative cooling. Recent rainfall on September 28 has moistened the boundary layer, raising humidity and moderating temperature drops compared to drier autumn patterns, while model consensus shows minor variations in cloud cover and wind timing that could shift the minimum by 1–2°C. This narrow range and inherent forecast uncertainty explain the closely matched market-implied odds near the 15–17°C thresholds, with traders weighting official observational data and ensemble runs ahead of resolution.