**Expected showers and increasing cloud cover on September 28 are the main factors capping peak temperatures in Chongqing, keeping market-implied odds tightly clustered between 27–30 °C.** Official and model guidance from sources including QWeather, Yr, and local Chinese meteorological services point to a high near 29–32 °C under partly to mostly cloudy skies, with rain probabilities of 50–75 % that reduce solar heating and enhance evaporative cooling. Recent days have shown a modest cooling trend from late-summer peaks above 35 °C, consistent with seasonal transition and strengthening northerly flow. Minor model spread—some runs favoring brief afternoon clearing that could allow 30–31 °C, others emphasizing steadier rain—explains why no single outcome exceeds 27 % probability. Resolution will hinge on the precise timing and intensity of precipitation relative to the daily maximum window.