I would hold off for another week or so until those nite temps get higher than 45 before planting. You can definitely put the tile (in a tub or try or something so that it doesn't dry up (mist spray!) and put it outside in the dappled sun/shade during the day and bring indoors at nite until the nights get warmer. In the meantime the day acclimation process can be done to get the tile going in your environment.
Have fun, Marilyn!
