Have an office without a window? Not sure whether to grab your jacket or umbrella on the way out? Sure you could hit the Internet or pop open a weather app on your smartphone, but what fun would that be?
Instead, why not build this ambient weather indicator from Instructables user tombrew? He connected an Adafruit Neopixel Ring to the internet with Electric Imp and configured it to grab the forecast from Weather Underground. Check out the full post for instructions.
NeoWeather: Ambient Weather Indicator [Instructables]