In response to many requests we have developed a small demo appplication for the weather station. It can be used to test the weather station after installation of Brickd.
The application implements three example projects. In the first example the measurements will simply be displayed on the LCD. The second one allows you to switch between different modes with the buttons of the LCD 20x4 Bricklet. It displays graphs, min, max and average values. The third project implementation can be configured to upload the measurements to Xively (Cosm).
For further information take a look at the documentation.