Honestly the temps have been perfect for the lower gorge for most of the past couple months. I haven't been down there in a while, but the weird weather this year means that we are likely to see a pretty stinkin' good LG season from here on out. Who really knows with the wacky weather this year...but I'm starting to think this warm weather will just keep getting better.
Good recommendations so far. Also look at North Point and the Student Wall if you want to acclimate to basalt before launching off on the sharp end. And look at the Shakespeare Wall for a couple more worthwhile climbs below 5.10.
As stated, it's hard to go wrong in the LG. Especially if you stick to some of the well known classics.