Here are a few favorite winter picture books, many of these are perfect for the younger readers, but really they are great for all your picture book loving kiddos. You can find my other list of winter picture books here.
Flannel Kisses by Linda Crotta Brennan
Biscuit's Snowy Day by Alyssa Satin Capucilli
The Snow Day by Ezra Jack Keats
Henry and Mudge Sparkle Days by Cynthia Rylant
White Owl, Barn Owl by Nicola Davies
Winter (Nature Projects For Every Season) by Phyllis S. Busch