Yes. It's perfectly fine to leave your rabbits in their hutch when it rains. However, you can bye covers to go over the hutch if you want them to be even more protected. - This is a good idea if there is snow and very cold weather.
A hutch.
By cleaning it.
Hutch.
Typically a hutch or a cage.
Hutch
hutch
Hutch
a cage a hutch
hutch
hutch
That would be its cage or hutch.
a hutch