Obviously every baby is going to be different and their own body temp is going to run different but for your baby (under a year old) what is the ideal temp you start going to short sleeves? My baby (almost 6 months) seems pretty average she doesn’t really run hot and doesn’t seem to get cold. She loves being in just a diaper but I feel like I keep my house too cool for that. It’s average 72° in my house during the day and 68° at night. I always read that you feel baby’s chest and back to see if they’re warm or cold. Her chest and back are almost always warm but her legs and arms almost always feel a little cold.