I will be in Las Vegas for Christmas day and after a week I would like to go to San Diego. Do you know how the weather will be on those days? Better than Vegas I suppose. I just checked Sea World ans Zoo web sites and they are open year round. Also I am worried about the distance. Is it far from Vegas to LA by car and then to SD? Do I have to go to L.A. first an then to SD? I appreciate your comments on this. Thank you.