Yep, mine handled temps like those just fine as far as how the door mechanism functioned. The control box display gets slooooow though. Buttons still do as they should, but the display takes a bit to catch up. So, if you don't know how many of which clicks you need to do something blind, it can be a bit tedious to change the settings when it's below zero. The battery levels it reports will also be lower in the cold but for me it only dropped 10%.Have you used yours through the winter yet? Website said it was tested through -4 but we see -10 to -20 at my place.