It can be hot as all get out in the summer and cold as can be in the winter...it all depends on what you are used to. My son went in the winter, but we live in the high dessert area where we get over 110 in the summer and minus 0 in the winter with lots of snow...he had no problem...what I thought was funny it was always a fight to get him to shovel snow here at home...he goes to boot and has snow detail and has to shovel the walk ways....lol
Either way all your PT is done indoors anyway....