Good news everyone!
I've finally ported ProperWeather to MineCraft 1.4.6, so you can download it. This build CAN'T be used with minecraft 1.4.5 or lower, because of important changes in CraftBukkit.
Download: http://dev.bukkit.org/media/files/661/415/ProperWeather.jar
Also, happy new year 2013! :)
