Recent forecast model runs from agencies like the China Meteorological Administration indicate a daytime high near 28–29°C for Chengdu on August 17, driven by weakening subtropical high pressure, increased cloud cover, and scattered thunderstorm activity across the Sichuan Basin. These conditions reduce surface heating compared with the hotter, clearer days earlier in the month while limiting extreme variability. Ensemble guidance shows modest spread around these values, consistent with the market’s tight distribution between the 27°C and 29°C outcomes. Historical August climatology in the region features frequent afternoon convection that can cap temperatures through evaporative cooling and reduced insolation, with official station readings tomorrow determining resolution.