I have been working on this issue for the past few weeks. If you view the Yahoo Weather source (i.e. newbielink:http://weather.yahooapis.com/forecastrss?z=15275&u=f [nonactive]), you should see the current weather info. However, it seems that info is cached. If you view that same page tomorrow or the next subsequent days, it will still show the original day's weather. To clear it, I found you can clear the cache from the browser, close the browser, and reopen the browser. Then, the current day weather is shown.
Any helpful tips are welcomed.