The Mavic manual advises not to fly in temperatures below freezing. However, it's certainly possible to safely do it with some extra care on your part. Check out the cold weather flying tips here, here, and here. And, check out these search results for more cold weather flying topics.
Are you flying a Mavic Pro? If so, did you purchase it in the Chicago area? Inquiring person in Wheaton wants to know!Yes as long as you start with warm batteries that just came from indoors, you should be fine. Just keep the flights shorter, not much more than 15 minutes or so to avoid the cold battery warning and possibly triggering a RTH. I just flew a few hours ago in downtown Chicago along the lakeshore path and a little bit over the lake and the air temps were in the low single digits and the wind chill factor even colder. I brought 2 extra batteries that I placed in Liposafe pouches and stuck them in the inner chest pocket of my down jacket to keep them warm. Swapped batteries twice and got around 50 minutes of flight time in the freezing cold. No issues.
From the Chicago area too (SW suburbs), put my P3 4K in the air last night (~24F) as well as last sunday (~32F/0C), during the snow storm. Battery usage a bit higher than normal (but so were the winds), no issues, just make sure your batteries stay room temp prior to flying. They will heat up during the flight....
Had issues with the ipad display freezing during the snow storm, but that is because snow was accumulating on the display... last night no issues with the iPAD