Recent forecasts from multiple models and agencies point to a Shanghai high temperature on September 26 centered on 30–31°C, driven by a moist subtropical airmass under increasing cloud cover and scattered rain or thunderstorms that will limit daytime heating. Official guidance shows highs near 31°C amid northerly or northwesterly flow, consistent with late-September climatology where average maxima decline from the mid-30s earlier in the month. Model runs indicate only modest uncertainty around the peak, with precipitation timing the main variable that could shave 1–2°C off the maximum if storms develop earlier than expected. Trader consensus at 30°C (46%) and 31°C (26%) reflects this narrow, well-constrained range ahead of official verification.