Hi Ron,
You can use SharePoint OOTB "RSS Viewer" webpart to retrieve and display weather information from yahoo rss feed with custom xslt, here are xslt code details below you can take a look.
http://blog.digitalmonkey.net/2010/03/create-weather-web-part-for-sharepoint.html#uds-search-results
Thanks
Daniel
Hi Ron,
When I insert he weather feed url below, and replace default xlst with code mentioned above, and click save for rss view web part, it will work, you can try again.
http://weather.yahooapis.com/forecastrss?u=f&w=2432010
More information about yahoo weather forecast rss feed below.
https://developer.yahoo.com/weather/documentation.html
Daniel