I think it is so much luck of the draw. We cruised mid July last year and we had a beautiful sunny day in Seattle when we left and then did not see the sun again until our last day as we approached Victoria. It was extremely foggy the entire week, like the boat's foghorn was going off constantly level of fog. We could see barely any scenery at all at times, even in port. It was basically misty or raining as well maybe 50% of the time. We took a tour up to the Yukon in Skagway and could see nothing. At one point the tour guide pulled over at an overlook and everyone on the bus looked at each other like why are we stopping here? There was so much fog we couldn't see 50 feet out the windows. Save the $1000 and go in August.