[Sarinpa1]

I believe the best and least of a bothersome way for this to be implemented would be via the laplace interface. Exact number for temperature would too be unnecesary, perhaps just some basics, along with regional data for each continent. So I'd see it as a single screen, showing the information for all of them.
(Editted note : Yes, pretty much like the picture Ryu posted. )
Accounting that some people for ...god knows what reasons avoid getting themselves a laplace thingie, well, I suppose that's their problem. One could possibly tell time from the posittion of sun on the sky and yet, we still have only the interface to check. (And playerhouse clocks.), therefore it feels bit unnecesary to place it elsewhere than there. (Would also explain why you know what the weather is like at Kysei, despite the fact you're traversing Gold. And there wouldn't be need for anything extra to track where you are. )


As I give it more thought, I could see there being a reason to not have access to laplace ICly, yet that doesn't stop people from getting it OOCly.