**Forecast models from sources including the GFS and regional guidance show Zhengzhou highs clustered in the mid-20s °C on September 26, with most runs indicating 26–27 °C under partly to mostly cloudy skies and light southerly flow.** This range reflects modest differences in predicted cloud cover and boundary-layer mixing: greater insolation under broken clouds supports the upper end near 27 °C, while more persistent overcast or higher humidity limits daytime heating toward 24–25 °C. Late-September climatology places typical maxima around 27 °C, and the current pattern lacks strong frontal forcing or significant moisture advection that would shift temperatures sharply. Market-implied odds spread across 24–27 °C capture this narrow but genuine model uncertainty ahead of final observations.