Uncertainty in short-term monsoon-driven variability keeps Chengdu's June 17 maximum temperature market tightly contested around the 25–30°C range. Subtropical high humidity and Sichuan Basin topography favor scattered afternoon convection, which can limit peak heating through cloud cover and brief showers even as seasonal averages reach 28–31°C. Recent model guidance shows modest differences in timing and intensity of potential precipitation, directly influencing whether radiative warming pushes readings toward 30°C or keeps them suppressed near 26–27°C. Official forecasts from agencies like the China Meteorological Administration will provide key updates on steering patterns and instability indices ahead of resolution.