Forecast consensus from models such as those referenced by timeanddate and regional sources points to an overnight low near 20–21°C for Shanghai on June 26, aligning with the tight clustering of market probabilities around 19–22°C. Key differentiating factors include the strength of nocturnal radiative cooling under variable cloud cover, boundary-layer moisture from the East Asian monsoon, and any weak frontal passages that could limit temperature drops. Late-June climatology shows typical minima of 20–23°C, with deviations driven by wind speed and urban heat-island effects. Traders are pricing in modest uncertainty from ensemble spread in short-range guidance ahead of the final 48-hour model runs.