Those temperatures aren't typical. The average high for Juneau in June is only in the low 60s and the average temperature for the day is about 55. Low temperatures tend to be in the 50s. Anyway, glacier day is really chilly. Nights tend to be cold, too, and you'll probably be out on deck for the Frozen show and some other events.A fleece and a nice rain jacket that can be worn together are probably a better option. When we went in May the only chilly day was glacier day. Most port days were in the 60s or 70s.
It's drier in June, but it's still pretty wet in June.From June through August, does it tend to be drier towards June or August?
LAX
This is what we did. We've done 2 Alaskan cruises in June. We had really nice weather on both cruises. On our first cruise I wore a heavy jacket and a tshirt on glacier day. On our second cruise I brought the same heavy jacket but never needed it. I wore a tshirt, sweatshirt, and a fleece lined Columbia light weight jacket and was fine. Our friends from Florida were in heavy coats though. We're from Ohio so we're used to really cold weather. If you're going to buy any kind of coat, get an inexpensive one from Walmart since you won't need it after the cruise. You can always buy a sweatshirt on the ship or at port if you need another layer. Also if you do any excursions in the rainforest, get bug repellent wipes. The mosquitoes are huge. We only saw them when we went hiking in a rainforest in Skagway.Layering is the key! I took a Columbia fleece jacket and a Columbia Rain Jacket. I could layer them if it was real cold or just wear the fleece if it was cool but dry, or just the rain jacket if it was cool and rainy.
You make an excellent point. Just being on ship or walking around the ports, we didn’t really need to bundle up much. It was warmer than normal. However, we did the helicopter/dogsledding up on the glacier and absolutely needed everything, including the waterproof pants I bought for our Patagonia trip, which I used but probably didn’t need for that trip. We are wussy Texans though. I was really glad we brought our waterproof hiking boots, because it was kind of dirty and dusty/muddy, even in port. That way our regular shoes weren’t constantly dirty or wet.I think part of it depends on what type of excursions you're doing. We sailed Alaska in late August 2012. In Juneau, it was 70 mid day. No jacket needed then. Our excursion was a trek on Mendenhall glacier and our meeting time was 7am at the pier. Due to the higher elevation and wind, it was more like 30 and felt around 20 on the glacier. I had disposible toe warmers, leather hiking boots, fleece shirt and a Columbia coat, and down mittens. It was bitter cold to have to change memory cards in my camera which of course filled while we were on the glacier.
I had every intention of bringing an empty water bottle to taste a sample of glacier water. In our rush to get ourselves & kids ready, be finished breakfast and be on the dock before 7, I forgot the water bottles. Once on the glacier, we had to use our hands to scoop us a taste. I had to let it go; it was way to cold to get my hands wet.Dh and our kids tried it and liked it.