We took a June trip to Alaska. My advice is to plan ahead of course, but watch the weather forecast. Some ports we were walking around in T-shirts and jeans. In Ketchikan it was very cold and raining. We went on the crab boat excursion, and I ended up wearing water resistant pants, long sleeved top, fleece jacket, rain coat, Sperry boots. At one point I used my hat and gloves. Overkill? Maybe, but I was glad I had these items.