It is the middle of summer, and boy is it hot.
Our idiom is rub off.
The first meaning is to remove something off a surface by rubbing it.
Example 1
Don't worry about putting lipstick on the mirror. It will rub off with a wet cloth.
The second meaning is to have someone's behavior or characteristics adopted by another person.
Example 2
I sure hope my husbands seriousness rubs off on our son soon. He doesn't take anything serious.
Example 3
My daughter has been hanging around some bad kids lately and their bad attitudes are rubbing off on her. I don't like it at all.