You can't tell whether it's going to rain five days from now very reliably, but you can predict within a degree the average monthly temperature in any city in t

You can't tell whether it's going to rain five days from now very reliably, but you can predict within a degree the average monthly temperature in any city in the world, for any month of the year, five years from now. So the extremely mild winter (in the continental US) that everyone's been saying was so shocking was actually forecast years ago? Or are you saying that this capability has only been developed in the last year or so?