What is right as rain?

"Right as rain" is an idiomatic expression in English that means everything is in good order, perfect, or in excellent condition. It is often used to describe situations where something has been fixed or resolved, and everything is functioning or progressing well again. For example, if someone is recovering well after being sick, they might say, "I was feeling terrible last week, but now I'm right as rain."

The origin of this expression isn't clear, but it has been used since at least the early 20th century. The phrase likely comes from the idea that rain is generally beneficial—especially in agricultural terms—indicating that things are as they should be. It's a reassuring phrase used to convey that all is well.