Persistent rainfall and extensive cloud cover across Chongqing on August 29 suppressed daytime heating, with official station observations recording a daily maximum of 27°C amid moderate to heavy rain, high humidity above 80%, and light northwest winds. This marked a sharp departure from the preceding heatwave that produced 37–40°C peaks, as incoming cold air and convective activity limited solar insolation and kept surface temperatures near or below the seasonal norm for late August. Numerical weather models and China Meteorological Administration guidance consistently pointed to this capped outcome once the rain began overnight on the 28th. An unexpected clearing of skies before peak heating or a localized station data revision could still alter the recorded maximum, though current observational consensus strongly supports the market-implied result.