**Heavy rainfall combined with cold air advection is the dominant driver capping Chongqing's peak temperature on August 29.** Official forecasts from the Chongqing Meteorological Bureau highlight a strong precipitation event from the night of August 28 into daytime August 29, driven by easterly flow interacting with northern cold air. This is expected to deliver heavy to torrential rain (30–80 mm, locally higher) across mid-western districts, with the urban core seeing moderate rain and reduced insolation. **The cooling effect from clouds, rain, and the cold air mass is projected to limit highs to the 27–31°C range in affected western and central areas.** Multiple models (including ECMWF, GFS influences in public outputs, and agency guidance) converge on daily maxima near 28–30°C for the city proper, with some showing 26°C or 30°C depending on exact rain timing and coverage. Historical late-August baselines are warmer (typically 33–36°C+ without such systems), making this event a clear downward shift. **Trader consensus clustering around 29–31°C reflects model agreement on rain-suppressed heating while acknowledging uncertainty in exact rainfall intensity, timing, and local variations.** Lower probabilities for 32°C+ or sub-27°C align with the forecast spread: stronger or more widespread rain favors the cooler end, while any breaks in clouds or delayed onset could push toward the higher side. Updated model runs and official briefings over the next 24 hours will be the key near-term catalysts.