From such an antique clock, you can know what the weather is going to be. Then you can decide what to dress and what to take. Isn’t it convinient for you life? And I think it could be accurate with Arduino Micro-controller that checks the weather on the Enviroment Canada website every fifteen minutes and update the hands accordingly. But I don’t know if it only can display the weather in Canada. And there is no commodity in the market, if you are interested in it, you can go to see the website(click here) of Sean Carney, who is the maker of this weather clock.