Latest numerical weather prediction models from the China Meteorological Administration indicate a daytime maximum near 28°C in Shenzhen on May 18, driven by widespread cloud cover and scattered light rainfall tied to a nearby trough that limits daytime solar heating. This setup keeps temperatures modestly below the mid-May climatological average high of 29–30°C at the official Bao’an station, with ensemble guidance showing only modest disagreement on the exact peak. Trader consensus remains tightly split between 27°C and 28°C because any brief clearing could allow readings to edge higher, while sustained overcast conditions would cap them at the lower end. Updated model runs from GFS and ECMWF over the next 24 hours will provide the clearest signals ahead of the date.