For a bunch of dogs that absolutely love swimming and getting wet, they sure don't like the rain much. The retriever is best of all of them, but even he likes to be dry once in a while. There's something about the rainy days that just don't scream "Let's go swimming!"
Rain is a GREAT time to work on training. There are so many things you can work on with them at this time! Umbrellas, Hoods, Rain Ponchos ... not to mention all the sounds, smells and sights that are associated with rain!
Do your dogs like the rain? How are they with umbrellas? Rain coats? Thunder?