2013 I left Michigan early May, returned early July. No problems with snow in any mountains in Alberta, BC or Yukon. I stopped in Banff while heading North and they were still mostly closed. They were in the process of clearing lots of snow, but nothing new was coming down. Stopped in Jasper on the way back, all the snow had melted, had a fantastic few nights at the Whistlers campground.
I spent the week around Memorial Day in Valdez and it was amazing, mid 70s and sunshine every day, 50s and clear skies at night. Flocks of bald eagle would come in to pester fisherman for scraps every afternoon. Lots of fresh halibut coming in, it's expensive but so much better than the cod they serve here in the lower 48.
The rest of Alaska was mostly off limits due to non stop rain and wildland fires. I tried to enjoy the Kenai, but the smoke was so thick, unless you were right on the beach, it was hard to breath.
They say you have a slim chance of seeing the peak of Denali, well, I couldn't see anything, the entire park was in a dense fog bank for a week, gave up on Alaska and went back to the Yukon. Spent a week in the Klondike, Dawson City, it was fantastic. Great weather day and night, no fires, no rain.
