By midsummer, the snow on top of the mountain is 'glacial snow', and the regular snow from the winter and spring storms has melted away...
My first time up at Mt. Rainier, was the Memorial Day after we moved here...and I was amazed at the amount of snow still alongside the roads...a lot depends on how much snow accumulated during the spring and the winter....
When you go up to Mt. Rainier mid summer, and look at the snow on top, the snow has a blue hue to it...thats the glacial snow...But when we were up there over Mothers Day, all the snow was glistening white, and fresh...so snowslides, and avalanches can still occur, even this late in the year...
Its spooky, but also fascinating..