I also live in Southern California, specifically in a desert area of the Inland Empire, and I have a mix of fescue and bluegrass. Recently my lawn went 15 days without being watered by my sprinklers (Nov 17 - Dec 2) and it handled it with no problem. Now during that time we did have a couple days of rain and very cool temperatures thereafter.
The only time my grass is ever watered everyday is for 2-3 months during the summer. During this time of year (fall/winter) my grass might get watered once a week. Some things to keep in mind is that with the cooler temps at night you tend to get much more morning dew (which helps to keep the grass watered), grass tends to go dormant so it's not actively growing and sucking up as much water, and if there are some cloudy and cool days, then your lawn is likely not losing much moisture to evaporation.
As you go about your daily activities, just take a look at your lawn, and if it looks like it's starting to brown, then run a manual schedule. Of course I don't know what type of grass you have, but in my experience, lawns are pretty resilient.