San Francisco is beautiful, most of the year, but yes there are those days when the fog comes rolling in or the rain just keeps on falling.  What to do ? well there is lots to do...  Travel down to South of Market near Yerba Buena Gardens where there are over 8 museums that will provide a great indoor experience.    With the kids visit  ZEUM  an innovative place that will provide everyone hours of enjoyment.  Music videos, animation as well as Metafield Maze - a life-size labyrinth are here which you will want to try again again to conquer.  Then head on over to the Cartoon Art MUseum where you can see originals from some of the most prominent cartoonists in the 20th century.  This museum is serious FUN.  Also in this neighborhood is the Contemporary Jewish Museumwhere it encourages the audience to explore  the contemporary perspective of Jewish Culture, art and ideas.   if the weather still has not let up and you want to try a different scene take Muni from Market St ( N-Judah Train) and visit Golden Gate Park. Yes,  you are going to a park in the rain but it is what is at the park that is fantastic.  The CA Academy has a four story rainforest  that should delight you while it is miserable outside.  The South African penguin colony will keep your attention.  Visit the deYoung Museum for some of the most amazing art collections in the world. Then afterwards enjoy lunch in their museum cafe and sip your cafe while dry.     

Great Dickens Christmas Fair, Cow Palace, every year from Thanksgiving to Christmas (http://www.dickensfair.com/)

Every holiday season between Thanksgiving and Christmas, there's a fantastic event that many people don't know about--the Great Dickens Christmas Fair, located at the Cow Palace 20 minutes south of the city on the 101.  This weekend event is a walk-through re-creation of Dickensian London.  Many of us have seen movies of Dickens' works--this indoor event takes you right there to the same world you saw in "Oliver Twist," "A Christmas Carol" (aka "Scrooge), "David Copperfield," "Great Expectations" and many others.  Costumed re-enactors walk the streets and speak directly to you in adorable English accents.  You can dance and play parlor games at Fezziwig's, have an ale or a hot buttered rum, stroll the streets and enjoy fabulous Christmas shopping, see what seems like a million differnet shows, even enjoy high tea.  Something for everyone.  The food is wonderful, the decor charming, and there are even real characters straight from the pages of Dickens, including Scrooge himself.  Bring the kids--very family-friendly except for Mad Sal's Dockside Alehouse, where the entertainment gets delightfully risque.  Note:  wear comfortable shoes!!