sWeather is a configurable tray-based app that provides weather conditions for the places that are important to you.
The interface is simple and lends to an easy setup; you can add as many locales as you need by entering city and state into WOEID Lookup located in the Configure tab under options. This weather is portable so that you can take it with you on your travels.
sWeather gives you some mild customization options like the ability to select tray icons and images for the conditions and temperature. If you opt to go a tad bit more in depth with the weather details, you can get a full forecast through Yahoo! Weather.