Outdoor Cameras - Temperature Question

My two outdoor cameras are up, one in the front at the corner of the garage, and one in the back in a corner covering the backdoors and bay  windows. Motion working fine, nice streaming with Google WIFI, one on AC, one battery and ready for the winter.....hmm, but the specs say -20F for the low but in the Chicagoland area it can go lowerthan that with windchills due to wind gusts of 40-50 mph, the question is will the cameras survive?

My doorbell pro has done quite nicely through at least 1 winter (maybe 2) and motion and entry sensors in my unheated garage have thrived.