If you want a webpart that displays the weather, then this is a nice web part. I downloaded it from Bamboo solutions, on this site: store.bamboosolutions.com. And it is very easy to setup. Here is an example:
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Welcome! My name is Lise Rasmussen, @SharePointBabe, and this is my blog where I write articles about SharePoint and Office 365. I am the host of WITGirls podcast where we share news and experiences about the same topics. More info in About.