Final answer:
Rain in 'Rain Reign' refers to a dog's name, not the weather phenomenon. The book by Ann M. Martin does not provide the exact weight of Rain, focusing instead on the relationship between the dog and its owner, Rose.
Step-by-step explanation:
The question you’re asking about “Rain Reign” suggests you’re referring to the book by Ann M. Martin, not a scientific measurement of actual precipitation weight. In the book, “Rain” refers not to weather but to a dog's name.
The character Rose Howard, who has a diagnosis of Asperger's syndrome, owns Rain.
The weight of Rain, the dog, is not specified in the book, as the story focuses more on the relationship between Rose and Rain and the challenges they face after Rain goes missing during a storm.
Therefore, an exact weight for Rain cannot be provided without additional context or assumptions beyond the text of the book.