I've done a 2-month tour in Ireland last summer and a few overnighter trips. The lady-friend and I want to plan a touring trip for this next winter (December and January), as we have six weeks off from school. We were initially thinking of flying somewhere that is pleasant during our winter, but we don't want to support an unsustainable travel method, and it would be nice to greatly reduce our expenses for this trip. We live in Northern California, and we are looking to take a bus or train to our starting destination.
Basically, we want to ride in minimal rain and cold without having to fly somewhere. Thank you for your advice.