Recent cold air advection across Shandong has driven a sharp temperature drop for September 9 in Jinan, with official China Meteorological Administration guidance and multiple models forecasting a daytime high near 23–25 °C under mostly cloudy to overcast skies and moderate northerly flow. These conditions limit surface heating compared with the warmer, sunnier days earlier in the month, producing the tight clustering of market-implied odds around 22–26 °C. Cloud-cover variability and minor differences in wind mixing or timing of any partial clearing remain the key uncertainties that could shift the final observed maximum by a degree or two before resolution.