My skin is gone really dry?

My skin was fine until the snowy weather came! My skin then started going really dry on my fore head and nose! I couldn't wear make up because it would come out patchy and you notice the dryness even more! But the snowy weathers gone over a month now and my skin is still very dry! I use Simple moisturiser and Clinique super balance make up but I don't think its the products because i have been using them for the past year! What could be causing this?