Yes it may be freezing outside, but winter time offers some spectacular scenes for photographers. For instance, you might want to capture the morning frost as it glistens on the landscape or a snow-covered image as the sun rises above it.
If you reside in a humid area you may have the chance to shoot the early morning frost just after sunrise. To do this, you just have to be ready to get up early. The frost will add some character to the image, but you should take them pretty quickly as the sun can melt the moisture in the air away quite fast.
When coming inside from the cold there could be some condensation on the camera’s lens and viewfinder because of the difference in temperature. It will disappear over a short period of time and you can also use a lint-free cloth as well as other camera-cleaning accessories to clean it off.