Enter "Weather Girl"
She tells people what the weather is and helps them wear the right clothes for that weather and keeps them from being hit on the head.
I assume by weather, but that was unclear from her narrative.
I asked her what her superpowers were, and I got a bit of a blank look, followed by "knowing . . . what the weather is?"
So Margaret's superpower is that she can look out the window.
Watch out, people. This one's going to rule the world.