California and the San Francisco Bay Area are known for lots of fog at different times of the year. Yet fog is hard to define scientifically. This is an excellent high level article about the science of fog in California, the impacts of fog on agriculture, and how climate change may or may not make fog disappear.

Source: https://www.kqed.org/news/11968495/with-climate-change-what-will-happen-to-the-bay-areas-fog