Weather forecasts certainly aren't hard to come by, but if you're looking for something super easy to glance at, DJAkbar's GitHub page has a guide for making a lamp that changes colour based on the forecast for the day.
The lamp uses forecasts from Weather Underground and LED strips to change the colours. The whole thing's powered with a Raspberry Pi and packed inside a DIY cloud lamp build from a plastic drink container and some cotton balls. It's a pretty easy little project. You'll find the guide for making it for yourself over on GitHub.