I will tell you what we are having in Saskatchewan! It is -41 C foggy, windy, blowing snow and really cold! It is recomended no travel, and the visiblity in a lot of places is less then 3 km.
You may ask... What does this have to do with horses? Well, blankets are coming out.
Today, just 15 minutes ago, I went out to the farm, to put the blanket on my horse. It is a heavy weight winter blanket and meant for -30 C with a winter coat. Well, Breeze knew what was coming, she came galloping up to the gate as soon as she heard her name, and put up no fight to get it on (sometimes if it is really windy, like today she will)
Also, I also learned that they had no hay or straw in the pen at the time I was out their, thankfully they were getting both when I was leaving.
So what do your horses do when it comes time to blanket? Is is blanketing weather yet for you?