These temperatures are not unexpected for us in November, December, January and February. I don't really mind so much on the days that I don't have to start my car, but it isn't great for the chickens. I won't be letting them outside today.
Luckily I had a pot of tender grass that I grew for them so that has kept them occupied. I also gave them some dried grass that I collected this summer. I cut and dried it for just such a day. Next I will take them some fresh straw to scratch through. I am glad it is the weekend, so I have time to be a chicken enrichment planner!