Forecast models from major centers show Shanghai's October 15 daytime high likely settling between 22–25 °C as autumn cooling strengthens under variable high pressure. Ensemble spreads reflect modest uncertainty from a passing weak frontal boundary and shifting wind directions that could either enhance or limit daytime warming by a degree or two. Historical mid-October normals near 23–24 °C provide a climatological anchor, while recent model runs have narrowed the range without locking in a single outcome. Traders are assigning the highest implied probabilities to 23–24 °C, consistent with the tight clustering of guidance and limited potential for extremes this far ahead of the date.