官方的天氣圖標設置PLASTICON圖標包。
Welcome to Chronus - PLASTICON icon set
This is not a standalone app, you need Chronus, Crius or Cclock.
This is the official weather icon set of Plasticon icon pack.
You can find it here -> http://goo.gl/DkD1nL
NOTE : This is only supported in version 3.4 and later of Chronus.