I also am a first time winter owner and at my old barn all the horses came in at night. At my new place, my horse has a run in and a stall (but she is only inside when we have inclimate weather). I too was unsure about blanketing and my trainer/barn owner said that she recommends blanketing when the weather gets consistently lower than 40 degrees. I have a lightweight and a heavyweight but I am planning to mostly use the lightweight turnout sheet unless we have a very cold winter. I live in the northeast so our weather varies QUITE a bit, I just wanted to be sure I had all the bases covered! 🙂 good luck!!