Latest ensemble forecasts from the China Meteorological Administration, GFS, and ECMWF models project Shanghai's highest temperature on May 1 at 24-26°C under mostly cloudy skies with light southwest winds, driving trader sentiment toward 24°C (34%) and 25°C (38%) as frontrunners. This follows a late-April cool spell with northerly outflows suppressing highs to near 13°C on April 29, now yielding to warmer southerly flow and seasonal recovery. Key differentiators include model divergences on cloud cover extent—thicker overcast favoring 24°C via reduced insolation, versus partial clearing boosting peaks to 25°C—and boundary layer mixing efficiency. Climatological May 1 highs average 23°C; final observational updates from Shanghai stations will resolve amid inherent short-range forecast uncertainty.