I have been thinking of just such a display (or something similar using Neopixels) and this gives me a great starting point. I love passive information delivery and this makes the upcoming weather so clear. I also had thoughts of building something similar for commute times, as my wife and son drive over an hour to college each day. (She is a professor and he is an incoming freshman at the same school) Knowing the current commute conditions can help them be aware of those days they need to leave earlier.
I would probably be building my project with Arduino and not Raspberry Pi, but a lot of the logic and design could be quite similar.
The creator has some nicely designed icons and also provides the API links to access the NOAA resources he used for the weather data. There’s even some great info on how he created the cabinet and mounted the LED Matrices. Very nice.
Displays the weather forecast for the next four days as icons on 8x8 LED matrices. Based on a Raspberry Pi using LED matrices from Adafruit. Housed in a custom built wood enclosure with a glass front panel.