The weather in Arizona represents well the diverse climate conditions one finds throughout the U.S. It also has the distinction of holding the world record for sunniest skies. Specifically, Yuma is listed in the Guinness Book of World Records as the world’s sunniest city with a staggering 4,000+ hours of sunlight per year. That’s an average of 11 hours of sunshine per day. Not a bad vacation destination for sun worshippers!