On the Channel Islands the climate is moderated by the marine influence with the result that summers are milder, there is generally higher humidity, and there is more frequent nocturnal fog compared to the mainland.
These climate regions occur in only five locations throughout the world including parts of California, along the Mediterranean Sea, central Chile, parts of southwestern Western and South Australia, and the southwestern Cape region of South Africa. This climate type is characterized by cool, wet winters with average annual rainfall of 8-40” and hot, dry summers. Channel Islands National Park has a Mediterranean-type climate.
