Phoenix Weather Forecast and Current Conditions including SW USA by TiggrWeather

Updated:  17 May 2012 1030 
  Mostly sunny, Dry Temperature: 92.5°F   +2.4 /hr Humidity: 9%  Dew Point: 25.4°F Wind: SE  2.2 mph Gust: 5.0 mph Barometer: 29.816 inHg   Steady Rain Today: 0.00 in UV Index: 8.6   Very High 

This is YoWindow, an animated widget, and screensaver if you want, that uses data from this station to show forecasts, current conditions, and drive the animation. Both free and paid versions are available.