Solar Energy Data for Illinois
Detailed solar irradiance and production data for 1 cities in Illinois. The state averages 3.89 kWh/m²/day GHI — Average solar resources.
Illinois near the national average for solar energy production. Solar installations are economically viable across most of Illinois, particularly where electricity rates are above the national average.
Illinois Overview
- Cities with data
- 1
- Avg. GHI
- 3.89 kWh/m²/day
- Solar Rating
- Average
- Best City
- Chicago (3.89 kWh/m²/d)
Cities in Illinois — Ranked by Solar Potential
1 cities| Rank | City | GHI (kWh/m²/d) | Peak Sun Hours | 5kW Production | Est. Annual Savings | Payback |
|---|---|---|---|---|---|---|
| #1 | Chicago (pop. 2,693,976) | 3.89 | 4.5 | 6,570 kWh | $834 | 12.6 yrs |
Analyze any Illinois location
These figures are city-level averages. For your exact address in Illinois, use SolarScope's Site Studio to account for roof orientation, shading, and your utility rate.