Yes here just south of chicago i grow minr in pots and bring into garage its attached to house so its a little warmer then one that is not,i put mine on 2x4s to keep off the cold cement and then they start to bud in the spring.Your 5 for a temp will kill the fig tree otherwise sad to say.
Martin

I live in Massachusetts. Gets cold enough to kill fig trees here. I bury my trees each year. They are about 12 to 15 feet tall. I tie the branches up. Dig a trench that is as long as the trees are tall....about 3 feet deep. Dig all around the root ball...then just tip them over into the trench. It takes about 4 to 5 hours. I usually do it each Thanksgiving. And when I dig them up in the spring....they are fine!!