(as) right as rain

: righteous, upright

: being in accordance with what is just, good, or proper

: conforming to facts or truth : correct

: qualities (such as adherence to duty or obedience to lawful authority) that together constitute the ideal of moral propriety or merit moral approval

: something to which one has a just claim: such as

: the power or privilege to which one is justly entitled

: according to right

: in the exact location, position, or moment : precisely

: in a suitable, proper, or desired manner

: to do justice to : redress the injuries of

: justify, vindicate

: avenge

: water falling in drops condensed from vapor in the atmosphere

: the descent of this water

: water that has fallen as rain : rainwater

: to send down rain

: to fall as water in drops from the clouds

: to fall like rain