christmas in san fran?

so we were talking today (my husband and I) about taking a trip. our birthdays both fall a few days after christmas. his the 28th and mine the 29th. birthday's have never been fun because you always get the 2-for-1 gift. here is your birthday AND christmas gift. we have never really done anything fun for our birthdays so we are thinking about heading to san francisco the day after christmas. we stayed here last time and loved it. we haven't been on a vacation for 2 years so we are ready for one!