Trader consensus centers on 27–29°C minimums for Shanghai on August 5 because short-range numerical weather models show persistent subtropical high pressure maintaining nighttime temperatures near seasonal norms, with dew points supporting radiative cooling limited to that narrow band. Early August climatology places average lows around 25–27°C under typical humidity and urban heat retention, while recent model runs indicate no strong cold advection or typhoon passage to push values lower or allow greater overnight drops. Extended guidance from sources like AccuWeather highlights overnight ranges of roughly 23–28°C through the period, aligning with the market's heaviest weighting on 28°C. Updated forecast cycles over the next 48 hours, particularly any shifts in steering flow or precipitation timing, represent the key variables that could adjust implied probabilities before resolution.