Your weather forecaster seems not to have looked outside.
I was going with sound and smell (and heat) because of the theme of the outside coming in through the windows. (Can’t see much, when you’re lying in bed with the blinds down :-).
The roar of mowers and construction trucks,
The smell of grass, chicks, geese, and ducks,
And leeches are noted for the blood they suck,
Now children, go upstairs and close the windows!