I don’t yet have the temperature sensing components yet, but that doesn’t mean that I can’t get the code out of the way.
Here is a site that I found to help me with the code needed to get a temperature sensor working. I may also use this as full environmental suite if I get enough components together, such as humidity, barometric pressure, etc.
I don’t know exactly what all I can do with a suite full of information about the environment around my house, but I still plan to implement it.
http://www.open-electronics.org/web-thermostat-with-arduino/