Empty apartment for a month. Should I close my Roladden?

I’m moving out of my apartment (that I own) and my Mieter won’t move in for about a month.

The apartment is empty now, but because I’m moving abroad, my Makler will take care of the handover. And someone will be in and out for painting.

What’s the best practice for leaving it empty? Do I close the Rollladen? Do I kipp the windows?

Mainly, I’m just thinking about the heat/humidity.