Just got back from 7 day trip on Sapphire Princess out of Seattle. We had near 70 degree day at Ketchikan with bright blue skies with zero clouds (guess that does not happen often). Juneau was cloudy, overcast, and breezy.......rain at Mendenhall Glacier. Skagway was somewhat overcast but VERY windy. Definitely need waterproof windbreaker type jacket.