We did Alaska the first week of September a few years ago and had everything from shorts weather (sunny and in the 80s) in Seattle and Victoria, rainy and chilly in Juneau and Sitka, sunshine in Ketchikan (really rare), to a beautiful sunny day in Glacier Bay that ran the gamut starting out with over-cast misty and light rain and multiple layers that we slowly peeled off to where we were in tshirts and jeans at Margery Glacier, then the closer and closer we got to Johns Hopkins Glacier the colder and colder it got to where we were bundled up in multiple layers again with ski jackets and rain pants pulled over top of jeans and long johns, gloves and beanies and still shivering and freezing our booties off. Pack for everything in September.
