Current numerical weather prediction ensembles place Chongqing’s July 11 maximum near 37–39 °C, producing the market’s tight clustering around those three outcomes. The Western Pacific subtropical high is expected to maintain southerly flow across the Sichuan Basin, while local topography and the urban heat-island effect favor daytime warming; however, modest differences in model timing of any mei-yu-related moisture or afternoon convection create the observed 1–2 °C spread. Historical July climatology shows daily highs averaging 33–34 °C, so the elevated guidance reflects an amplified ridge rather than an extreme outlier. Updated high-resolution runs and 48-hour mesoscale guidance expected over the next two days will further narrow resolution criteria for the official station reading.