Temperatures

I have a weather station thingy with a base and a remote unit; the base lives in the living room and the remote unit in my bedroom. I have my thermostat set at 75 (I know, you'll see in a minute). The temperature in my living room: 73.6 degrees. The temperature in my bedroom: 88.0 degrees. I don't think turning the thermostat down another couple degrees will help.