HomeKit defines a Temperature Sensor that can be used for "what's the temperature " (I'm not sure "outside" will work, as that currently works without Homekit be querying other weather services). There is also a Light Sensor that can be used to expose Current Ambient Light Level. There is no way to expose wind speed.
I have a weather station top of my roof that tells me the outside temperature but also the brightness and current wind speed.
In openhab2 those are configured as numbers. I would also like to be able to ask Siri
"What is the current wind speed" and get an answer like "The current wind speed at your house is 5 meters per second"
Would sth like this be possible?