Our tanks are made to be out in the sun. However, shade is preferred; material life and water quality is improved if not stored in direct sunlight.
Water freezes at 32° F or 0° C. The tanks, however, are rated for -40 degrees Fahrenheit. If you're worried about your water freezing, we recommend leaving at least ten inches of room for expansion. It is not common for Water Supply Tanks tanks to freeze all the way through but it will happen if the conditions are cold enough for an extended period of time. Many of our water tanks are stored in unheated garages during the winter and rarely have a problem with freezing.