Plus rain - -
I've biked cross-USA a half dozen times - - up North a half-dozen times.
It rains a lot more in the North country. Maybe I was just supremely unlucky six times, but I had lots of rain day after day every trip. My 2001 trip was probably the best - when I had sunshine at Wrangell-St. Elias and had a sunset on the beach at Yukutat - one of the rainiest places in the world! But you have to be prepared for soggy conditions, too.