Not familiar with sandiego weather myself, but regardless, if you attempt outdoor year round enclosures, keep in mind the microclimates you create inside your enclosures. Free running wild chams can find warmer microclimates in times of cold- in deep vegetation for example, against south facing barriers (concrete walls or boulders or hillsides for example- which build heat in the day and release heat at night) or in the case of wild veileds, they have been known to seek shelter beneath large rocks to avoid night frosts.
So you might consider working out ideas for special enclosure construction that would provide a little warmer than ambient temps in the winter (block out northern windows, build heat from the south) and a little cooler in the summer.