Peak sun hours in Arizona (2026)
Arizona averages 6.6 peak sun hours per day — 40% above the US average of 4.7. In practical terms, every 1 kW of solar there produces about 1,927 kWh of electricity a year.
Peak sun hours/day
6.6
Annual kWh per kW
1,927
vs US average
+40%
What this means for your system
To produce a given amount of electricity, you need fewer panels where there are more peak sun hours. At 6.6 hours, a typical home in Arizona needs a system sized to its usage and local sun — see exact numbers on the Arizona solar cost page or work it out with our sizing guide.
Peak sun hours by city in Arizona
Sunlight varies within Arizona. Here are city-level figures from multi-year irradiance data.
Peak sun hours in Arizona: FAQ
How many peak sun hours does Arizona get?
Arizona averages about 6.6 peak sun hours per day — 40% above the US average. That works out to roughly 1,927 kWh of electricity per year for every 1 kW of solar installed.
Is Arizona good for solar based on sunlight?
Sunlight is only part of the picture. Arizona's 6.6 peak sun hours help production, but your electricity rate and incentives matter just as much. See the full economics on our Arizona solar cost page.