My only confusion was when I’d correctly reduced one word to the required for the phrase, but didn’t get any feedback that it was correct. I didn’t understand why it wouldn’t accept my “valid” shorter word
If you scroll down on to the bottom of Apple Weather it has a “Report an Issue” button which allows you to report current weather conditions at your location.
I have no idea what happens to that data and if it contributes to the report in any way.