Asking us in Alberta what the night time temps are is a daunting question. In Edmonton, this last month, we have had lows in the 70's(20s C), right down to lows in the 40's(teens c). If you head into the Rockies, the answer can be lows in the 60's to lows in the 30's. If one is close to glaciers, the lows can be in the 20's(-teens C). Just to support the old addage: If you don't like the weather, wait a few minutes.