Mike, our lowest temp was 28 degrees F. It was only for a couple days. This was a year of little rain, so no frost or snow. In other years like last year, snow fell, but it didn't stick. Heat rises, but in the valley below the commercial citrus orchards have these turbines to keep the citrus from freezing. We heard those go on (they are loud) about 5 nights.
We do have low chill days and zone 9b is able to grow things like Avocados, Pomegranates, Olives, Guavas, Citrus, Wine Grapes, Macadamias, Pistachios, and low chill varieties of peaches, pears, plums and apricots.
I would love to have every fig out there, and we do have a lot of property in which to plant them. All in good time!
Suzi