My teacher says English has funny weather words. What do these mean?

1. "It's raining cats and dogs!" means...

   It's raining very hard.There are lots of pets outside.

2. "It's only drizzling." means...

   It's raining a little.It's raining a lot.

3. "It's pouring!" means...

   It's raining a lot.It's very sunny.

Thanks, you saved me! 🎉