Below, you'll see any text that was highlighted with comments from the reviewer.
I liked that this is a word I would actually use in real life at some point. Very practical.
Waiting until the weather is postrainzeit to go outside.
You would know best of course, but this word does not seem to be an adverb. And adverb describes a verb.
Postrainzeit in the example is describing "weather" I believe, so that would make it an adjective.
I liked this word so much, I used it in a recent poem! ;)