A method and apparatus for temperature sensor calibration is disclosed. In one embodiment, an integrated circuit (IC) is tested at a first known temperature corresponding to a first temperature threshold. During the test, a first temperature reading is obtained from a temperature sensor. A first offset is calculated by determining the difference between the first known temperature and the first temperature reading. The first offset is recorded in a storage unit for later use during operation of the IC. During operation, the first offset may be added to temperature readings obtained from a temperature sensing unit to produce an adjusted temperature value. The adjusted temperature value may be compared to one or more temperature thresholds. Based on the comparisons, a power management unit may perform power control actions.