If you want to make your own system for doing so, Instructables user ICStation shows off how to use an Arduino to do it. The system here monitors temperature, humidity, and smoke levels and alerts ...

There’s an Arduino with a custom shield that interfaces the barometric pressure sensor, real-time clock chip, a digital temperature sensor, and a humidity sensor. On top of that shield is an ...

“The addition of a reusable humidity and temperature ... Users can program the recording interval from one minute up to 24 hours. Downloaded data is presented in summary, graph, and parsed ...