Solar Energy & Solar Power Resources

Solar Energy in Janesville, WI

Solar Energy in Janesville

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

Solar Panels in Janesville

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

Sunrise & Sunset in Janesville

The total length of the day in Janesville, WI today (January 21, 2026) will be 9 hours and 38 minutes. [More]

Solar Power in Janesville, WI

Solar Energy Data in Janesville, WI

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

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

Solar Energy Analysis for Janesville, WI

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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 Janesville

Solar Radiation Data in Janesville, WI

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

Sorry, data is not currently available.

Solar Radiation Analysis for Janesville, WI

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Historical solar radiation data for Janesville is not currently available.

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

Solar Power Levels in Janesville

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

Solar Power: Janesville vs. the U.S.

Below is a month-by-month comparison of how average Janesville 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 Wisconsin is not currently available.

Solar Data & Statistics for Janesville

Sunrise / Sunset in Janesville

Sunrise/Sunset for January 21, 2026 ^[2]
- Sunrise: 7:18 am
- Sunset: 4:56 pm
- Length of Day: 9:38

Best Months for Solar in Janesville

Monthly data not currently available.

Solar Panel Installs in Janesville

We do not currently have data on solar panel installations in the city of Janesville, WI at this current time.

Solar Power Output in Janesville

The Power of Solar in Janesville, WI

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

AC output data is not currently available.

Solar Output Analysis for Janesville, WI

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

Historical solar radiation data for Janesville is not currently available.

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Cost of Utilities in Janesville

Janesville Electricity Costs

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Solar Power Poll: Janesville

Vote now: Given all of the data and analysis provided for Janesville, is solar power a good choice for residents of this city?

Janesville Natural Gas Costs

Sorry, Wisconsin residential natural gas prices are currently unavailable.

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Weather Forecast for Janesville, WI ^[5]

Wed Jan 21

24°F

Snow
Min: 20°F
Max: 26°F

Fresh Breeze: 23 mps WNW
Precip.: Chance of Snow
Humidity: 83%
Cloud cover: 83%

Thu Jan 22

19°F

Light Snow
Min: -5°F
Max: 19°F

Fresh Breeze: 19 mps WNW
Precip.: Chance of Snow
Humidity: 80%
Cloud cover: 59%

Fri Jan 23

-9°F

Few Clouds
Min: -17°F
Max: -6°F

Moderate breeze: 18 mps NW
Precip.: n/a
Humidity: 74%
Cloud cover: 12%

Sat Jan 24

-1°F

Overcast Clouds
Min: -10°F
Max: 2°F

Light breeze: 4 mps NNE
Precip.: n/a
Humidity: 68%
Cloud cover: 100%

Sun Jan 25

7°F

Light Snow
Min: -9°F
Max: 9°F

Light breeze: 5 mps WNW
Precip.: Chance of Snow
Humidity: 65%
Cloud cover: 21%

Mon Jan 26

12°F

Scattered Clouds
Min: -8°F
Max: 20°F

Moderate breeze: 16 mps WSW
Precip.: n/a
Humidity: 75%
Cloud cover: 25%

More about Janesville

About Janesville

The city of Janesville, WI in Rock County has an approximate population of 63,575. ^[6]

Janesville, WI Solar Energy

To learn more about solar energy and solar power Janesville, WI, or for more solar-related resources for Janesville, visit the U.S. Energy Information Administration.