Highest temperature in Shanghai on September 7?

What this question means

Three questions on this board cover Shanghai's high temperature across a single week, and read in sequence they describe a trend rather than three separate guesses.

This one, 7 September, peaks at 30°C with 52%, with 29°C close behind at 40%. The 9 September question peaks at 28°C, and the 10th at 28°C again.

So the crowd is pricing a cooling of roughly two degrees over three days, and doing so with decreasing confidence as the dates get further out — 52% here, then 57%, then 44% on the most distant. The second of those breaks the pattern slightly, which is a reminder that forecast skill does not degrade perfectly smoothly.

Reading a set of related questions together is almost always more informative than reading any one. A single distribution tells you a state; a sequence tells you a direction, and direction is usually the thing worth knowing.