Abstract: Provided are energy management systems which are configured to receive real-time outside temperature at the location of a building, receive initial temperature control set points for each of one or more zones inside the building and adjust the temperature control set points for each zone of the plurality, taking the outside temperature and the initial temperature control set points for the zone as parameters. The adjusted set points can then be used to guide heating and/or cooling in the respective zone. Methods of setting up and using the systems are also provided.