The climate control screen is not implimented as there is no climate control function, plugin or external app available for Road Runner at present.
The climate button on the front menu was orginally done by BTBE to copy the real iDrive menu in the BMW's. I have for now decided to leave that as it is.
To get the weather you can either press the little sun and cloud icon from most of the screens, or navigate through communication and then select weather.
I might change this in later versions to be accessed from the climate button. (as that would seem to be a more appropriate place for it).