If you want to use a probe, that’s another option. You can get any standard DS18B20 probe and connect it to a Z wave device that will report to smartthings. See the following discussion
That said, probes are usually terrible at reporting plain old ambient air temperature. They really work best when they are either submerged in ground or liquid or taped to a pipe. So you can try it, but I’m not optimistic for this particular use case.