**Real-time surface observations and numerical weather prediction models from Chinese meteorological agencies show Qingdao reaching a daily maximum near 30°C on September 23 under partly cloudy skies with light southerly flow.** This consensus, reflected in the market's near-certain 30°C outcome, aligns with coastal Shandong's late-September climatology, where diurnal heating under moderate humidity and minimal cloud cover typically produces highs of 26–31°C. Key variables supporting the outcome include observed afternoon peaks around 30–31°C in available station data and model agreement on limited marine influence moderating temperatures. Resolution hinges on the official highest recorded value at local stations; minor downward revisions from localized sea breezes or measurement timing could shift the exact outcome, though current conditions make substantial deviation unlikely.