There really is no easy answer to this. "Wintertime" weather in L.A. is extremely variable. "Monthly Average" temperatures don't really mean a lot, since some days can be like summer - with sunny skies and temperatures in the mid-70s. (Nights will still be pretty cold, however, dropping down to the 40s and low 50s.)mlm said:We are going to DL Dec 28 to Jan3, coming from Alberta, Canada where it is COLD during that time. Just wondering what the weather will be like in CA?