Recent numerical weather prediction models, including runs from the Global Forecast System and European Centre for Medium-Range Weather Forecasts, indicate a high-pressure ridge over eastern China that should support daytime maxima of 33–35 °C in Shanghai on August 5, with limited cloud cover and light winds limiting afternoon mixing. Shanghai’s urban heat-island effect and high humidity typical of the East Asian summer monsoon further favor readings near the upper end of that range. The market’s heaviest weighting on 34 °C (38.5 %) and 33 °C (27.5 %) reflects this consensus, while lower probabilities for 35 °C or higher account for possible onshore flow or scattered showers that could cap temperatures. Updated model guidance and local observations from the China Meteorological Administration over the next 48 hours will determine whether the distribution shifts.