Meet the Elgato Eve: a wireless outdoor sensor that works with HomeKit to let you monitor your environment in a smarter fashion. Eve Weather senses temperature, humidity, and air pressure. It is water resistant (IPX3 rated). It keeps track of the weather and makes the data available on your iPhone and iPad.
Eve connects to your iPhone using Bluetooth. You will be able to use Siri to ask for temperature or humidity. Like what you see? You can order yours for $49.95.