You can definetly put tile outside in freezing temps. Just make sure you use a porcelain, quarry, or clay(saltillo) tile. I personally would go with a porcelain tile set in premium modified thinset mixed with straight additive and use epoxy gruot. If you want to be extra cautious in regards to cracking due to the slab settling, you might want to also put down some kind of crack resistent membrane such as noble seal or ditra mat.