Recent cooling from northern air masses interacting with eastern flows has disrupted Chongqing’s prolonged subtropical high, driving scattered to heavy rainfall through August 29–30 and lowering peak temperatures relative to the prior 37–39 °C readings. Official guidance and ensemble models converge on a 27–31 °C range for August 30, with midwestern districts most suppressed by cloud cover and precipitation while eastern sectors retain slightly higher insolation. Differentiation among the tightly matched market outcomes hinges on the precise timing of rain cessation, local orographic effects across the municipality’s varied terrain, and residual model spread in boundary-layer moisture and wind direction, all of which can shift the daily maximum by 2–4 °C.