Wind may be implemented at some point, but for now the wind is set to a constant 0 velocity, so the only air flow is from your own movement. I agree that it would add a lot to the experience!

We do plan on doing weather simulation, but it will be some time before we get around to implementing it properly. Before then we want to simulate tectonics and glacial erosion in the world gen erosion code, have simulated real-time economics that players can observe/interact with, and simulate more with NPCs.