It isn't working from in-house with 9.0.1 on an iMac.  For right now, the simple explanation is
probably that the WeatherData database is down.  Sorry.

Help menu - Internet Connectivity, Test Internet Connectivity  works, so it isn't the whole redundant server setup.

The simple answer is that the Raspberry Pi build is currently *allowed* to run more functionality than it will succeed at completing. Under ideal networking conditions, some of the curated data calls will succeed. They're more likely to succeed if they're run a second time after the first failure. They're far more likely to succeed on a Raspberry Pi model B than a model A because of the increased memory. They're also more likely to succeed if you follow the command with a semicolon (though it takes an absurdly long time): 
 The distribution is still an experimental pilot release and should not be viewed as a commercial-grade Mathematica product at this time. That said, we're doing some significant performance optimization and future versions should behave a lot more consistently with the main product. With problems like these, I recommend making WolframAlpha do your heavy lifting for you: 

Dear Alex et al,

I don't think that 
is the answer to the question why we cannot connect to the data servers. Neither the weather data nor the financial data works on OSX (or Linux or Windows). I am using it in a class full of students on all sorts of systems and none of us can access the servers. We can also not reach them from the Raspberry Pis. 

Apparently Bruce had the same problem on a Mac.

M.

Dear Alex,

does 
work on your computer (not Raspberry)?

Dear Sean,

thanks. That was helpful! That means that 
still works, which it does! Problem solved.

M