150. Country description Size: small but beautiful country, total land area of 8,019 square miles (20,768 square Km), about the size of the state of New Jersey. Official Name: Principality of Wales Climate: maritime, rainfall is frequent. Annual average of rain is 55 inches(1,397 mm). Annual mean temperature 50 degrees F. (10 degrees C.) Summers are cool, winters are mild with lot of rain. Location: It is part of Great Britain, comprised by England and Scotland, and surrounded by water on 3 sides. Population: About 2.9 million people, a mere 5% of the population of the United Kingdom. Capital: Cardiff Official Language: Welsh, but everyone does speak English as well.