Traders see the highest temperature in Chongqing on May 18 clustering tightly around 24–26 °C because short-range ensemble forecasts show only modest spread in afternoon maxima. Regional models from the China Meteorological Administration and global systems such as ECMWF currently place the city under weakening westerly flow ahead of a subtropical ridge, allowing gradual warming while scattered low-level moisture and possible light afternoon showers limit further gains. The Sichuan Basin’s topographic trapping of humidity keeps dew points elevated, reducing the diurnal temperature range, and the urban heat-island effect adds a consistent 1–2 °C increment over surrounding rural sites. With only 48 hours until the measurement window closes, the next model cycles and fresh satellite observations of boundary-layer moisture will determine whether the peak settles at 25 °C or edges into the low 26 °C range.