Forecast models from Chinese meteorological agencies indicate Shanghai's August 14 maximum temperature will likely peak near 29–30°C under typical late-summer subtropical high-pressure influence, with moderate humidity and light southerly flow limiting extreme heating. The close split between these outcomes reflects uncertainty in cloud cover and boundary-layer mixing, which can suppress or enhance daytime radiative warming by 1–2°C. A shift toward clearer skies or weaker onshore breezes could favor 30°C, while increased moisture or frontal remnants would cap readings at 28°C. Historical mid-August climatology supports this narrow range, though ensemble spreads remain wide two days out.