In one example, a method includes determining, by a device, a plurality of voltage values that each correspond to a respective voltage drop across a remote p-n junction while the remote p-n junction is biased at different respective current levels, wherein each of the plurality of voltage values is a function of at least: one of the different respective current levels, a temperature of the remote p-n junction, and a series resistance between the device and the remote p-n junction. In this example, the method also includes, determining, by the device, an intermediate value based on a difference between at least three voltage values of the plurality of voltage values, wherein the intermediate value is not a function of the series resistance, and determining the temperature of the remote p-n junction based on the intermediate value such that the temperature is not a function of the series resistance.