I went to McGinnis Meadows Cattle Ranch in Libby, MT two years ago in mid-May. When we saddled up in the morning, it would be 26 degrees and by lunch, it would be a very pleasant 70. I fell in love with Montana during my week out there, but I am pretty sure I couldn't handle the cold and long winters. Hubby and I are seriously considering retiring in that area, but only staying there May-October and having another smaller place in a warmer climate for the winters. But I have to say..the view of snow capped peaks in May, from the back of a horse, is something that is hard to beat!