Multiple authoritative forecasts from meteorological services, including Open-Meteo and regional models, show Shanghai reaching a daily maximum of 24°C on October 15 under overcast skies with light southeast winds. Hourly data indicate the peak occurring midday or early afternoon near 24–24.2°C, consistent with seasonal norms for mid-October and stable atmospheric conditions lacking significant advection or radiative forcing changes. Trader consensus at 100% implied probability for exactly 24°C reflects this tight observational alignment and low forecast spread. Minor deviations could arise from station-specific microclimate effects or final measurement rounding, though current model runs and real-time readings make such shifts improbable before resolution.