For Stock Weather Plus I stuck to the stock look as much as possible, but also added a few very useful enhancements:
•The icon in the top left is your 7th icon from your main applications screen and is intended to be used for your Weather app.
•If you select the Time/Date area it will open your Clock.
•There is a hidden today area that will popup and show your 5 upcoming appointments and 5 new messages.
Here are some screenshots. Click on them to see them full size:
Download the theme file below.
OTA Install: Stock Weather Plus
For installation instructions see the very bottom of this page.