Sunniest States

Sunny days bring more than just good vibes. Sunshine catalyzes life on Earth, facilitating critical processes like photosynthesis, weather patterns, and even our mental health. Moreover, in an era of ever-increasing technological sophistication, sunlight is a promising source of clean, renewable energy. As our world shifts towards more sustainable methods of power generation, identifying the sunniest regions becomes imperative. For those intrigued by solar energy, especially for powering their homes, knowing where the sun shines the most within the U.S. can guide both living choices and investments.

Our data is based on the average annual sunlight, measured in kilojoules per square meter (kJ/m²).

• The 'Sunbelt' reigns supreme: The southwestern U.S., including states like Arizona, New Mexico, and Nevada, tops the list as the sunniest region, boasting over 5,000 kJ/m² of annual sunlight.
• Texas and California, two of the most populous states and leading economies in the U.S., also rank highly, suggesting substantial opportunities for solar energy infrastructure and use here.
• Eastern states generally receive less sunlight than their western counterparts, with the exceptions of Florida and, to a lesser extent, South Carolina, which are southern states known for their sunny climes.
• The least sunny states include predominantly northern/ northeastern ones such as Maine, Vermont, and Washington, all receiving less than 4,000 kJ/m² of sunlight annually.

The most sun-drenched state in the U.S. is Arizona, where the average annual sunlight measures a radiant 5,755 kJ/m². Arizona's tranquil desert climate and clear skies give it an unrivaled advantage in terms of solar power potential, which is increasingly recognized and utilized in energy plans across the state.

Not far behind is New Mexico, with its average annual sunlight hitting 5,642 kJ/m². Nevada is the third sunniest state, receiving an annual average of 5,296 kJ/m² of sunlight. Next in line is Texas and California, each with a yearly sunlight average above 5,000 kJ/m², scoring 5,137 and 5,050 kJ/m² respectively. While not exceeding the 5,000 kJ/m² mark, states like Colorado, Oklahoma, Kansas, Utah, and Florida each receive ample sunlight, between 4,859 and 4,960 kJ/m² annually.

Ten Sunniest States (average annual sunlight):

1. Arizona - 5,755 kJ/m²
2. New Mexico - 5,642 kJ/m²
3. Nevada - 5,296 kJ/m²
4. Texas - 5,137 kJ/m²
5. California - 5,050 kJ/m²
6. Colorado - 4,960 kJ/m²
7. Oklahoma - 4,912 kJ/m²
8. Kansas - 4,890 kJ/m²
9. Utah - 4,887 kJ/m²
10. Florida - 4,859 kJ/m²