I don't think the rain affects them much it is washington, except for maybe big nasty storms, they do live here we all know how the weather gets. i believe it just gives the hunter an advantage to get closer before they take off. blackies are sneaky, if they dont want you to see them you wont. ive have seen a big 4x4, get down on its knees and crawl out of sight (no joke). personally i believe bad weather just tips the scale in our favor.