WetSock

WetSock brings current weather conditions and forecasts to your desktop. It uses the integrated services of Windows to connect to the Internet and to update the weather information for your location. It sleeps in the background until you connect to the Internet, and then it will gather weather information at requested intervals. This release adds hour-by-hour forecasts extracted from aviation data and displayed in plain language. It also supports monitoring as many as 10 cities in the tray, or through a central weather panel, and weather info for 3300 cities in 200 countries all over the world.

Limitations:

3-city, 3-weather-update trial