The weather channel's long-range forcast is now showing the party weekend. Currently they say partly cloudy with a high of 77 for the Saturday. Lows will be in the low 50s. Sounds perfect! Of course, it's been my experience that the weather channel forcast is not very accurate further ahead than, say, a half hour (and sometimes they blow that), so don't place bets yet.

In any event, it should be in the 70s during the day and the 50s at night regardless. The only real variable is whether it'll be storming or not.