Basically, this is how the 4 seasons in Shanghai work:
Summer -> Cooler summer -> (Quite harsh) Winter -> Cooler summer -> Summer
A few of days ago, it was about 7 degrees one day, and then 24 degrees the next. I was wearing a winter jacket one day, and then the next a polo shirt.
It’s gonna get a tad cold again next week though:

I suppose it mirrors the unpredictability, instability and indecisiveness of nature (or God, if you’re a believer), and echoes human nature.