Recent weather model consensus and persistent subtropical high pressure over eastern China have positioned mid-30s Celsius readings as the most probable outcomes for Shanghai’s August 2 maximum, driving the market’s heaviest implied probability on 36 °C. July’s observed peaks near 38–39 °C, sustained by above-normal sea-surface temperatures in the western Pacific and limited monsoon rainfall, have raised the baseline for early-August heat while urban heat-island effects and high humidity further elevate apparent temperatures. Ensemble forecasts currently cluster daily highs between 34–37 °C, with only modest chances of reaching 38 °C or above unless a stronger ridge builds. Traders therefore assign the highest weight to the 35–37 °C band, reflecting both climatological norms for the first week of August and the narrow window for significant model shifts before resolution.