Recent ensemble forecasts from the China Meteorological Administration and global models such as ECMWF indicate a daytime maximum near 29°C in Shenzhen on May 21, driven by widespread cloud cover, scattered showers, and moderate easterly flow that restricts solar heating across the Pearl River Delta. This atmospheric setup aligns with typical late-spring conditions in the region, where humidity and precipitation moderate peak temperatures below seasonal averages of around 30°C. Trader consensus has priced the 29°C outcome at near-certainty, reflecting tight model agreement on limited intensification potential. Clearer skies or reduced moisture could allow brief spikes toward 30°C, though current observational trends and steering patterns make such shifts improbable before resolution.