Recent ensemble forecasts from major models indicate a highest temperature in Shanghai on June 22 most likely between 24–26 °C, as persistent cloud cover and scattered showers associated with early summer moisture transport limit daytime heating. This keeps readings below the late-June climatological average near 28 °C while producing the tight clustering of market-implied probabilities around those three outcomes. Key differentiating variables include the precise timing and intensity of convective rainfall, boundary-layer moisture, and shortwave radiative flux under overcast skies, all of which introduce forecast spread that traders weigh against official guidance updates expected from the China Meteorological Administration and global numerical weather prediction runs over the next 48 hours.