We were there in June and it was still really cold. We did this hike and when we got to the glacier it started raining...we hid under a tree and watched the rain. It was amazing! Can't wait to take the kids.
Tough hike, but well worth it when you summit. Spent the night at the campsite 1 mile from the summit. Get there early enough to see the sites and set up camp. Take only what ya need, but plenty of water.