Solar Energy & Solar Power Resources

Solar Power in 61104 (Rockford, IL)

Solar Energy in 61104

Sorry, historical solar radition values for 61104 are currently unavailable, please check back later.

Solar Panels in 61104

Solar panels in 61104 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 61104

The total length of the day in 61104 (Rockford, IL) today (September 08, 2025) will be 12 hours and 51 minutes. [More]

Solar Energy in 61104 (Rockford, IL)

Solar Energy Data for 61104

See the chart below to see how different types of solar panel installations compare in 61104.

Historical solar power output data for Rockford is not currently available.

Solar Energy Analysis for 61104

Sorry, it is not possible to complete our solar energy analysis for 61104 at this time.

Please check back later.

Solar Energy Glossary

Global Horizontal Irradiance (GHI)

Global Horizontal Irradiance: The total amount of solar radiation that is received per unit area by a surface that is always positioned in a horizontal manner.

Direct Normal Irradiance (DNI)

Direct Normal Irradiance: The total amount of solar radiation received per unit area by a surface that is always perpendicular to the sun rays that come in a straight line from the direction of the sun at its current position in the sky.

Average Tilt at Latitude (ATaL)

Average Tilt at Latitude: The total amount of solar radiation received per unit area by a surface that is tilted toward the equator at an angle equal to the current latitude. ATaL will often produce the optimum energy output.

Solar Radiation Levels in 61104

Solar Radiation Data in 61104

See the chart below for monthly solar radiation levels in 61104.

Sorry, data is not currently available.

Solar Radiation Analysis for 61104

Sorry, it is not possible to complete our solar radiation analysis for 61104 at this time.

Historical solar radiation data for 61104 is not currently available.

Please check back later.

Solar Power Comparison: 61104 vs. the U.S.

Solar Power Levels in 61104

Sorry, solar radiation data for 61104 is not currently available.

Solar Power: 61104 vs. the U.S.

Below is a month-by-month comparison of how average 61104 solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city with historically low levels (WA). ^[1]

Sorry, solar radiation data for Illinois is not currently available.

Solar Data & Statistics for 61104

Sunrise / Sunset in 61104

Sunrise/Sunset for September 08, 2025 ^[2]
- Sunrise: 6:28 am
- Sunset: 7:19 pm
- Length of Day: 12:51

Best Months for Solar in 61104

Monthly data not currently available.

Solar Panel Installs in 61104

We do not have data on solar panel installations in ZIP Code 61104 at the current time.

Solar Power Output in 61104

The Power of Solar in 61104

Monthly AC solar system output averages for 61104. Month-by-month solar power, as ranked by AC output, in 61104. ^[2]

AC output data is not currently available.

Solar Output Analysis for 61104

Sorry, it is not possible to complete our solar radiation analysis for 61104 at this time.

Historical solar radiation data for 61104 is not currently available.

Please check back later.

Weather Forecast for 61104 ^[5]

Mon Sep 8

69°F

Sky Is Clear
Min: 46°F
Max: 74°F

Gentle Breeze: 10 mps SSW
Precip.: n/a
Humidity: 54%
Cloud cover: 4%

Tue Sep 9

70°F

Few Clouds
Min: 50°F
Max: 75°F

Gentle Breeze: 12 mps S
Precip.: n/a
Humidity: 50%
Cloud cover: 14%

Wed Sep 10

71°F

Overcast Clouds
Min: 61°F
Max: 78°F

Gentle Breeze: 11 mps SE
Precip.: n/a
Humidity: 55%
Cloud cover: 98%

Thu Sep 11

77°F

Sky Is Clear
Min: 56°F
Max: 79°F

Light breeze: 7 mps NE
Precip.: n/a
Humidity: 59%
Cloud cover: 0%

Fri Sep 12

81°F

Overcast Clouds
Min: 57°F
Max: 84°F

Gentle Breeze: 8 mps ESE
Precip.: n/a
Humidity: 54%
Cloud cover: 87%

Sat Sep 13

75°F

Moderate Rain
Min: 65°F
Max: 80°F

Moderate breeze: 14 mps S
Precip.: Chance of Rain
Humidity: 73%
Cloud cover: 97%

More about 61104

About 61104

The ZIP code 61104 is associated with the city of Rockford in Winnebago County in Illinois.

61104 Solar Energy & Power

To learn more about solar energy and solar power in 61104, or for more solar-related resources for IL, check out the U.S. Energy Information Administration.