There are several water turtle species that are perfectly fine in those temps as long as they have somewhere to dig in under straw or leaf litter on land and the pond is deep enough to not freeze solid. Better yet install a stock tank heater to keep it from freezing solid over the top and your choices expand. We have a good many native turtles on the east coast and even up into canada around the great lakes where it goes well below zero. The western pond turtle native on this side of the country is found all the way up to BC Canada so again below zero or at least well below 19 and for a longer period of the year. For example the western painted you asked about is found all over minnesota, north dakota, and montana where temps can drop to over 30 below zero.
So again as others have told you was best research and google these turtles needs and ranges online and you will have your answers. I have had many turtle species and captive bred a good many of the ones i kept. Right now i have a common snapper, mississippi map and 6 young juvenile rio grande sliders that i have had since newly hatched just over a year ago.