Clearly, you need to move. To somewhere with nice work and fewer crazy bosses! (But not to Melbourne or Christchurch, which have similarly very changeable weather.)

When I was growing up in England we were always taught to open everything up on a hot day to let the breeze through, so it's against what seems to be sensible to us. Since moving to Australia, I have learned that this is only any use if there actually IS a cold breeze, not if you're just hoping for one ;-) (And also that 30 isn't that hot. But that's another story.)