You do know, don’t you, when the weather person is standing in front of some live TV picture, he or she is not really outside.
It called Chroma Key.
The person is standing in front of a blank, green background and the picture is “keyed” in replacing the green.
That’s why that person never wears green or bits of the picture would show on them.
Now that you know – you also know what shows up on this live picture really isn’t there in the studio.
Now, someone please tell the weather lady.