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 ...

Makers, hobbyists and electronic enthusiasts looking for a project to keep them busy this weekend may be interested in this awesome Arduino temperature and humidity sensor which has been created ...

I used an LCD shield to display the current temperature and speed of the fan, but you can use the circuit without the LCD display. You also need to select the transistor by the type of fan that you ...

Monitor temperature, humidity, and air pressure in every room with the Aqara Temperature Sensor. Optimize comfort, prevent damage, and automate your HomeKit smart home.

(Sadly, that is not the case for the first-generation ‌HomePod‌.) Below, we show you how the temperature and humidity sensor information appears in the Home app, and how you can add automations.