5 Sunniest States in the US

3. Arizona

Average Annual Sunlight (kJ/m2): 4,268

Arizona has a mixed climate with semiarid, arid, and humid climates across various regions. Summers in the state are typically intensely hot. With a GDP of $459 billion, Arizona’s economy is driven primarily by copper production, which remains the main industry. Other significant industries in the state include electronics, communications, aluminum, and aeronautics. Arizona is at the third position on our list of the sunniest states in the US.