I know you guys are all on tenterhooks regarding the weather for my big ride tomorrow, so let me set your minds at ease: temps should range from 50ish to 80ish, 0% chance precip, light winds am picking up to 10ish mph by afternoon. High humidity at the start (96%) when its cool but declining to 40% by afternoon as it warms up.
To summarize: that's some lucky weather.