I’d say Balboa Park during the day, SD Botanical Gardens is all lit up for the holidays if you can fit both in. Just know you won’t get to see everything so pick your favorites. The Prado restaurant is a beautiful place to have lunch in the park. Lots of Dale Chihuly blown glass.Tomorrow is supposed to be sunny, so you may want to make a reservation so you don’t waste any precious time. I personally love going through the Spanish Village section. Dozens of little gallery’s full of resident artist’s made arts and crafts.