WeatherBar is an application which will show weather updates in windows 7 taskbar, It has the ability to integrate with the Windows 7 taskbar. Therefore, instead of constantly switching to the desktop to take a peek at the pinned gadget, the user can simply take a look at the taskbar, or right-click on the application icon on the taskbar to read the forecast.
You will need to set your location, before you start getting weather updates. It also provides you a map of US cities, from where you can easily choose your city as shown in the image below.
Once it is configured properly, it will show a icon in windows taskbar, you can right click that icon to check out weather forecast.
It will show you the weather forecast 4 days forward all the time, so that you have an idea how is weather going to be in coming days.