We cruised to Alaska on the Star Princess in July, 2003. I brought all sorts of clothes with me and I'm glad I did. We sailed out of Seattle, and much to our surprise, it was gorgeous in Seattle: Sunny and warm. That was it though. I think we saw sun in Victoria Canada towards the end of our cruise, but all the ports in Alaska were cloudy or misty. I'd say the temps were about 50-60 degrees. It wasn't cold, but with the rain, etc. it felt raw. As long as you dress layered, you can always take things off if you get warm. It's beautiful in Alaska however so you don't even realize that the sun rarely shines. However, I have heard where some folks have had luck with the sun. It's breathtakingly beautiful and you will NEVER forget this cruise. Have a wonderful trip!!