This is a weather station clock programmed in Quartz Composer. There are 6 different parameters that are taken into consideration. The temperature, air pressure, rain drop, humidity, wind speed and direction. Weather information is downloaded from Osnabrueck University Physics Department's web page and an XML parser extracts different parameters. These parameters determine then the background color (reddish for warm and bluesh for cold), diameter of the turning rainbow wheel (high air pressure), global blurriness (humidity), speed of the wheel (average wind speed).
Two examples illustrates how the clock behaves under different weather conditions:
