I was just the opposite. My winter baby was great, didn't worry at all, but summer petrified me and I was so worried she'd overheat. In summer you're still expected to wrap baby which I just worried about so much, but in winter, you can wrap and actaully feel that they will be warm (newborn is prob the one time you can get hands wrapped up too, so you know they're all snuggly). if it's freezing it is very unlikely they will overheat even if you have a few thick layers on. You can tell by their face anyway, and could see if baby was hot, but in the cold I doubt it. xo