まだ雪が降っている。窓の外見ながら、自分に言った。もう一週前に雪を降っていた。冬だから当然だと思った。もうすぐ起きないと。今日はとても寒いな。 この表現は自然ですか？

I'm trying to write this:
"―It's snowing again ― I muttered to myself while watching at the window. Since a week ago is was snowing nonstop, it was winter so it was something normal. It's was almost time to wake up. It seems really cold outside. "

Thanks :)