Who Trusts Those 10-Day Weather Outlooks?

So I have some travel plans for the weekend of the 4th, and I was wondering what the weather would look like in Corinth, N.Y. Turns out we're looking at some cloudy skies and temperatures that'll hover around 80 degrees or just south of that mark. If I were to bag out on my colleagues and stay several days beyond the weekend, I'd by styling: Thursday, July 10 in Corinth will be sunny and 81, the perfect summer day.

But who believes in these 10-day outlooks?

Will D.C. really be 89 with scattered T-storms on July 10?