Due to global warming, almost everywhere in San Francisco Bay Area is getting warmer. On those days, when the temperature were averaging over 90F, Daly City can be 10 to 20F cooler. It can be due to fog or be close to ocean. Even when there is no fog, usually the cool air would blow in to cool whole city down. Other people in the Bay Area may have to turn on air conditioner just to be able to sleep, Daly City residents do not have to because the natural air condition created by the cool breeze from ocean.