I will be in Pontresina for three nights September 5-8 and had planned to do several hikes, enjoying the trails and scenery in fall weather. I see that a rain and snow mix is forecast for September 1 (the farthest out the forecast goes today), with temps between 34 and 47! I am looking for other options--day trips on the train? I must admit I'm a bit of a fair-weather hiker and photographer. Maybe I'll get lucky and the weather will warm up by then. Any ideas?