Solar Energy & Solar Power Resources

Solar Power in 40251 (Louisville, KY)

Solar Energy in 40251

Sorry, historical solar radition values for 40251 are currently unavailable, please check back later.

Solar Panels in 40251

Solar panels in 40251 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 40251

The total length of the day in 40251 (Louisville, KY) today (January 21, 2026) will be 10 hours and 1 minutes. [More]

Solar Energy in 40251 (Louisville, KY)

Solar Energy Data for 40251

See the chart below to see how different types of solar panel installations compare in 40251.

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

Solar Energy Analysis for 40251

Sorry, it is not possible to complete our solar energy analysis for 40251 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 40251

Solar Radiation Data in 40251

See the chart below for monthly solar radiation levels in 40251.

Sorry, data is not currently available.

Solar Radiation Analysis for 40251

Sorry, it is not possible to complete our solar radiation analysis for 40251 at this time.

Historical solar radiation data for 40251 is not currently available.

Please check back later.

Solar Power Comparison: 40251 vs. the U.S.

Solar Power Levels in 40251

Sorry, solar radiation data for 40251 is not currently available.

Solar Power: 40251 vs. the U.S.

Below is a month-by-month comparison of how average 40251 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 Kentucky is not currently available.

Solar Data & Statistics for 40251

Sunrise / Sunset in 40251

Sunrise/Sunset for January 21, 2026 ^[2]
- Sunrise: 7:53 am
- Sunset: 5:54 pm
- Length of Day: 10:1

Best Months for Solar in 40251

Monthly data not currently available.

Solar Panel Installs in 40251

We do not have data on solar panel installations in ZIP Code 40251 at the current time.

Solar Power Output in 40251

The Power of Solar in 40251

Monthly AC solar system output averages for 40251. Month-by-month solar power, as ranked by AC output, in 40251. ^[2]

AC output data is not currently available.

Solar Output Analysis for 40251

Sorry, it is not possible to complete our solar radiation analysis for 40251 at this time.

Historical solar radiation data for 40251 is not currently available.

Please check back later.

Weather Forecast for 40251 ^[5]

Wed Jan 21

37°F

Rain And Snow
Min: 26°F
Max: 39°F

Moderate breeze: 15 mps SSW
Precip.: Chance of Rain
Humidity: 73%
Cloud cover: 100%

Thu Jan 22

34°F

Overcast Clouds
Min: 29°F
Max: 37°F

Gentle Breeze: 10 mps WSW
Precip.: n/a
Humidity: 45%
Cloud cover: 98%

Fri Jan 23

22°F

Overcast Clouds
Min: 13°F
Max: 30°F

Moderate breeze: 13 mps N
Precip.: n/a
Humidity: 25%
Cloud cover: 100%

Sat Jan 24

15°F

Overcast Clouds
Min: 12°F
Max: 19°F

Gentle Breeze: 12 mps NNE
Precip.: n/a
Humidity: 31%
Cloud cover: 100%

Sun Jan 25

19°F

Snow
Min: 13°F
Max: 20°F

Gentle Breeze: 10 mps NE
Precip.: Chance of Snow
Humidity: 95%
Cloud cover: 100%

Mon Jan 26

15°F

Light Snow
Min: 1°F
Max: 17°F

Gentle Breeze: 11 mps NW
Precip.: Chance of Snow
Humidity: 82%
Cloud cover: 51%

More about 40251

About 40251

The ZIP code 40251 is associated with the city of Louisville in Jefferson County in Kentucky.

40251 Solar Energy & Power

To learn more about solar energy and solar power in 40251, or for more solar-related resources for KY, check out the U.S. Energy Information Administration.