IRS-1C spacecraft is the most advanced civilian remote sensing satellite built in India with a steering panchromatic camera having a ground resolution of 5.8 m. A passive thermal control system (TCS) augmented with manual and auto heaters are provided. The spacecraft completed four years of operation since 28th Dec'95. The TCS of the spacecraft has been very good. Temperature variation of the spacecraft is presented and discussed here. A nominal rise in temperature of the spacecraft observed is found to fit linear equation, and the same could be used to predict a conservative value of the temperature for the next few years.