Determining if a MeasureTemperature variable is empty

[balala]

But at this moment I can't test that code because the "Wheather.com" API doesn't return data to me, I suppose that if I make many time requests in a row because I have to do tests, they will ban my public IP for a while.

Accessing the site multiple times during testing may get your IP blocked for a time.

I'm working from time to time with weather.com and in those cases I refresh the weather skin quite frequently, but had never such experience. Never have been banned, the skin works well even after more refreshes. I know I should have been banned more times, but had not (me at least definitely had not).