How to lower the temperature limit of a regular NTC thermistor
No, there's no electrical way to make a sensor measure values outside its operating range.

However, heat flow is in many ways analogous to electrical flow, so it is at least theoretically possible to create a "temperature divider" using a pair of thermal resistances. For example, you could have an insulated metal rod that has one end at the freezer temperature and the other end at ambient temperature. (Obviously, this would require drilling a hole through the wall of the freezer.) Use two thermistors, one at the ambient end and the other part way along the rod. This would allow you to extrapolate the temperature of the freezer.