Recent model runs from global and regional ensembles indicate persistent cloud cover, scattered showers, and a tropical moisture surge over eastern China, limiting daytime insolation and capping Shanghai’s maximum on August 14 near 28–29 °C. These conditions have shifted trader consensus toward the 28 °C and 29 °C outcomes, which together exceed 74 % implied probability, well below the month’s climatological average of 32–35 °C. Minor divergence among guidance on the timing of any late-day clearing keeps the two bins closely matched, while probabilities for 30 °C or higher remain low pending clearer signals in the next 48-hour forecast updates from the China Meteorological Administration.