The girl said I was a weather forecast. How to reply?

If a girl says you are a weather forecast, you can reply like this:

1. If she asks in a friendly tone, you can say, "Haha, I care more about the weather."

2. If she is teasing, you can say, "Then I am really your exclusive little radar."

The above reply is only a general reference, and the specific reply can be adjusted according to the specific situation of your relationship and conversation.