**Incoming cold air from the north combined with widespread heavy rainfall is cooling Chongqing ahead of August 29.** Official forecasts from the Chongqing Meteorological Observatory highlight a strong precipitation event spanning late August 28 through August 29, with western and central areas seeing heavy to torrential rain (30–80 mm, locally over 100 mm) plus thunderstorms and gusty winds. This setup suppresses daytime heating and promotes evaporative cooling, pushing minimum temperatures notably below recent values near 27–29 °C. **Forecasts converge on overnight lows in the low-to-mid 20s °C.** Center-city projections show nighttime readings around 24–26 °C on the 29th–30th transition, while broader regional guidance lists ranges of 20–24 °C. Model consensus and observational trends support trader emphasis on 21–24 °C outcomes, with slight spreads reflecting local topographic effects across Chongqing’s varied terrain and uncertainty in exact rainfall timing or intensity. Historical August minima are higher, but the current synoptic pattern—enhanced by the cold-air surge—creates a narrow window for these cooler readings before conditions moderate.