**Trader sentiment for Chengdu's August 28, 2026, overnight low centers on model consensus around 23–26°C, with market-implied odds peaking near 25–27°C amid expected thunderstorms.** Multiple forecasts from sources like WeatherBug, The Weather Network, and Chinese meteorological outlets project a daytime high near 30–33°C followed by a low of roughly 23–25°C under partly to mostly cloudy skies and a high (70–90%) chance of rain or thunderstorms. Light winds, high humidity (often 70–90%), and the Sichuan Basin's topographic trapping of moist air limit strong radiative cooling after sunset. Thunderstorm timing matters: evening or overnight precipitation and cloud cover can suppress temperature drops by retaining heat and adding evaporative effects, favoring the upper end of the range (25–27°C), while clearer breaks could allow slightly more cooling toward 23–24°C. Urban heat-island influences from Chengdu's dense built environment further moderate nighttime lows. Recent developments include the post-"fu" (dog days) transition with increased convective activity and a gradual seasonal cooling trend, keeping probabilities clustered rather than skewed. Forecasters note typical model spread of 1–3°C for 48-hour outlooks in this humid, topographically complex region, explaining the tight clustering around the leading outcomes.