Palm Springs - great rates right now, play by the pool all day.
Big Bear Lake - if you have an RV there is a campground w/a pool, I can't remember the name. The weather is in the 80's. Or you could hotel it.
Not sure where you live but there is so much here in So Cal. Get a hotel or rent a condo and visit Legoland or Seaworld?
Rent a place at the beach!
At 1 years old, the tough things is finding a place that you will be comfortable with having a 1 year old in (they get in to so much at this age). We did a few trips when my daughter was 1 and had to baby proof the heck out of the places we stayed - it hardly seemed worth it.
So much to do around here!
Good luck,
M.