Recent ensemble forecasts from major meteorological models project Shanghai’s overnight minimum temperature on May 26 near 24°C, supported by persistent subtropical high pressure, moderate humidity near 70%, light variable winds, and variable cloud cover that together limit nocturnal radiative cooling under typical late-spring subtropical conditions. This aligns with updated model consensus showing daytime highs near 29°C transitioning smoothly overnight, consistent with historical May baselines adjusted for current atmospheric stability. Traders assign near-certain implied probability to the 24°C outcome because small deviations in cloud cover, wind patterns, or surface moisture would need to align precisely to shift the reading even one degree lower. Unlikely scenarios that could challenge this include an unexpected clear-sky radiative cooling spike or a sharper influx of drier air, though current guidance shows limited scope for such shifts before resolution.