Peak sun hours in Oregon (2026)
Oregon averages 4 peak sun hours per day — 15% below the US average of 4.7. In practical terms, every 1 kW of solar there produces about 1,168 kWh of electricity a year.
Peak sun hours/day
4
Annual kWh per kW
1,168
vs US average
-15%
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 4 hours, a typical home in Oregon needs a system sized to its usage and local sun — see exact numbers on the Oregon solar cost page or work it out with our sizing guide.
Peak sun hours by city in Oregon
Sunlight varies within Oregon. Here are city-level figures from multi-year irradiance data.
Peak sun hours in Oregon: FAQ
How many peak sun hours does Oregon get?
Oregon averages about 4 peak sun hours per day — 15% below the US average. That works out to roughly 1,168 kWh of electricity per year for every 1 kW of solar installed.
Is Oregon good for solar based on sunlight?
Sunlight is only part of the picture. Oregon's 4 peak sun hours are below average, so panels produce a little less, but your electricity rate and incentives matter just as much. See the full economics on our Oregon solar cost page.