Weather Control Structure

A structure that can control weather, guaranteeing either clear skies or rain/snow (biome/height dependent) within a certain radius. Either comes in the form of a block + structure much like the conduit (more realistic in my opinion), or with an update to beacons that would give them more options than just giving the player status effects. 

As to what this block would be called, look like, or how it'd be discovered - all up to Mojang! 

There's already a few mechanics tied to rain (trident, charged creepers, etc), and with the introduction of lightning rods and grimstone in 1.17, this would allow players to provide incredible ambience to their builds. From a gameplay perspective, maybe even more mechanics could be tied to rain (crop growth, etc), and as stated earlier, it's very similar to a conduit - wouldn't feel out of place in vanilla Minecraft at all!

(It wouldn't change the biome or anything radical, just the weather)