I'm getting the same forecast that I had for yesterday, and if it holds true, then it's just going to be very hot. Yesterday in YiWu (about 90 minutes out of Hangzhou) it was about 39 degrees.
Light cloud today, and a very (un)comfortable 37 degrees (at the moment). Last night, at midnight, it was a significantly cooler 36 ...
. Thank the deities for hotel airconditioning!
Mind you, I am also further inland, so the coastal effects don't hit as hard here (I hope), normally.