Solar Energy & Solar Power Resources

Solar Power in 40121 (Fort Knox, KY)

Solar Energy in 40121

Sorry, historical solar radition values for 40121 are currently unavailable, please check back later.

Solar Panels in 40121

Solar panels in 40121 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 40121

The total length of the day in 40121 (Fort Knox, KY) today (January 27, 2026) will be 10 hours and 12 minutes. [More]

Solar Energy in 40121 (Fort Knox, KY)

Solar Energy Data for 40121

See the chart below to see how different types of solar panel installations compare in 40121.

Historical solar power output data for Fort Knox is not currently available.

Solar Energy Analysis for 40121

Sorry, it is not possible to complete our solar energy analysis for 40121 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 40121

Solar Radiation Data in 40121

See the chart below for monthly solar radiation levels in 40121.

Sorry, data is not currently available.

Solar Radiation Analysis for 40121

Sorry, it is not possible to complete our solar radiation analysis for 40121 at this time.

Historical solar radiation data for 40121 is not currently available.

Please check back later.

Solar Power Comparison: 40121 vs. the U.S.

Solar Power Levels in 40121

Sorry, solar radiation data for 40121 is not currently available.

Solar Power: 40121 vs. the U.S.

Below is a month-by-month comparison of how average 40121 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 40121

Sunrise / Sunset in 40121

Sunrise/Sunset for January 27, 2026 ^[2]
- Sunrise: 7:50 am
- Sunset: 6:02 pm
- Length of Day: 10:12

Best Months for Solar in 40121

Monthly data not currently available.

Solar Panel Installs in 40121

We do not have data on solar panel installations in ZIP Code 40121 at the current time.

Solar Power Output in 40121

The Power of Solar in 40121

Monthly AC solar system output averages for 40121. Month-by-month solar power, as ranked by AC output, in 40121. ^[2]

AC output data is not currently available.

Solar Output Analysis for 40121

Sorry, it is not possible to complete our solar radiation analysis for 40121 at this time.

Historical solar radiation data for 40121 is not currently available.

Please check back later.

Weather Forecast for 40121 ^[5]

Tue Jan 27

25°F

Scattered Clouds
Min: 2°F
Max: 27°F

Moderate breeze: 15 mps WSW
Precip.: n/a
Humidity: 63%
Cloud cover: 48%

Wed Jan 28

18°F

Scattered Clouds
Min: 2°F
Max: 22°F

Gentle Breeze: 9 mps W
Precip.: n/a
Humidity: 65%
Cloud cover: 27%

Thu Jan 29

26°F

Overcast Clouds
Min: 8°F
Max: 30°F

Light breeze: 5 mps NE
Precip.: n/a
Humidity: 71%
Cloud cover: 100%

Fri Jan 30

23°F

Light Snow
Min: 15°F
Max: 25°F

Gentle Breeze: 9 mps NNE
Precip.: Chance of Snow
Humidity: 87%
Cloud cover: 100%

Sat Jan 31

15°F

Light Snow
Min: 8°F
Max: 18°F

Moderate breeze: 13 mps N
Precip.: Chance of Snow
Humidity: 70%
Cloud cover: 100%

Sun Feb 1

21°F

Broken Clouds
Min: 7°F
Max: 24°F

Gentle Breeze: 9 mps NW
Precip.: n/a
Humidity: 68%
Cloud cover: 62%

More about 40121

About 40121

The ZIP code 40121 is associated with the city of Fort Knox in Hardin County in Kentucky.

40121 Solar Energy & Power

To learn more about solar energy and solar power in 40121, or for more solar-related resources for KY, check out the U.S. Energy Information Administration.