The game pulls data from the Wii's Forecast Channel and puts it in the game. So can you play in the rain? If you live in Chicago it's going to be a tough game. I'm sure you can toggle this feature on and off though.

Pretty sure that that was in last years game.

" Pretty sure that that was in last years game. "

I think Black and White did this first, but I'm not sure.

That sounds pretty neat though. So if there is a tornado, then it'll be a bit more difficult to get a whole in one?

It came out in June, so yeah. Pretty sure Tiger Woods PGA Tour 10 is last year's game.

 And if you live in Canada, I guess you'll be playing golf in the snow all winter.  

Does it use your local forecast or does it take the forecast from the area each course is in?
Local seems kinda stupid,   
But if it's real time weather for each course, That would be pretty sweet.

Looked into it:

 Dynamic Weather Conditions—Powered by the Wii Forecast Channel, real-time weather now has a major effect on gameplay conditions. If it’s raining in Pontre Vedra Beach, Fl, then you too can face the challenge of a rain-soaked TPC Sawgrass.