You're worried about a three degree variation?

You ought to try being a PILOT and THEN you'll see why you need to do your own wx forecasting.

The weather guesser is like the stockpickers on MSNBC. They do the best they can but none get fired for being wrong so they don't get much better nor apologize for being blatantly wrong.

Have you heard that the issue is no longer "global warming?"
It's now "global climate change." Just to be sure all the bases are covered ;-)