Two tihngs, Osofast:

1) Weather predictions out that far are not always so accurate.
2) Underground shows only to the 4th - and even then, it's 40% chance of rain, not bad.

What I would like to know is if they see a front coming (not good, certain rain then) or just popup storms?
All we can do, is hope for the best. I know spring weather was awesome this time, and I remember goood weather last fall, too.