Traders have converged on 31°C as the day's maximum in Shenzhen with near-certainty because current observations and short-range model guidance confirm a peak at that threshold amid typical early-summer monsoon conditions. Regional climatology places the June average high near 31°C, and recent data show temperatures climbing to this level despite earlier thundery showers and high humidity that had briefly capped readings around 29°C. Official forecasts from agencies such as the Met Office and regional models now align with afternoon maxima of 30–31°C under moderating southerly flow and partial clearing. A realistic challenge would require sustained heavy convection or an unexpected cool surge that prevents the thermometer from registering 31°C before midnight, though updated observations make this outcome increasingly unlikely.