Applying the laser-induced phosphorescence technique, the phosphorescence from a phosphor-coated surface can be used for the determination of the surface temperature during hydrocarbon fuel combustion in a porous media burner. An adapted intensity ratio (IR) method was applied for temperature determination and compared with two other IR methods. Temperature calibrations were executed in an oven which can be operated up to 2073 K. The adapted IR method allowed temperature measurements which were more accurate than the other two IR methods, applied for comparison. Compared to additionally performed thermocouple measurements and to published results in the literature using an infrared camera, the adapted IR method turned out to be the more accurate one. The temperature results were also in good agreement with numerical simulations given in the literature.