First of all, external weather monitoring is very important for research purposes, but if the house is built properly, it shouldn't make much of a difference for general functionality and comfort. I do have lots of ideas for integrated controls for heating, cooling, lighting, shading, watering and power generation that would require some outside weather readings.CompaniesI haven't done much research into viable companies, but one brigth star is the Davis company. It has a series of devices that are very capable and diverse.